The difference between Remain and Rest

When used as nouns, remain means that which is left, whereas rest means relief from work or activity by sleeping.

When used as verbs, remain means to stay behind while others withdraw, whereas rest means to cease from action, motion, work, or performance of any kind.

check bellow for the other definitions of Remain and Rest

Remain as a noun (mostly, in the plural):

That which is left; relic; remainder.
Remain as a noun (in the plural):

That which is left of a human being after the life is gone; relics; a dead body.
Remain as a noun:

Posthumous works or productions, especially literary works.
Remain as a noun (obsolete):

State of remaining; stay.

Remain as a verb:

To stay behind while others withdraw; to be left after others have been removed or destroyed; to be left after a number or quantity has been subtracted or cut off; to be left as not included or comprised.
Remain as a verb:

To continue unchanged in place, form, or condition, or undiminished in quantity; to abide; to stay; to endure; to last.

Examples:

"There was no food in the house, so I had to remain hungry."
Remain as a verb:

To await; to be left to.
Remain as a verb (copulative):

To continue in a state of being.

Examples:

"The light remained red for two full minutes."

Rest as a noun (uncountable, of a [[person]] or [[animal]]):

Relief from work or activity by sleeping; sleep.

Examples:

"I need to get a good rest tonight; I was up late last night."

"The sun sets, and the workers go to their rest."
Rest as a noun (countable):

Any relief from exertion; a state of quiet and relaxation.

Examples:

"We took a rest at the top of the hill to get our breath back."
Rest as a noun (uncountable):

Peace; freedom from worry, anxiety, annoyances; tranquility.

Examples:

"It was nice to have a rest from the phone ringing when I unplugged it for a while."
Rest as a noun (uncountable, of an [[object]] or [[concept]]):

A state of inactivity; a state of little or no motion; a state of completion.

Examples:

"The boulder came to rest just behind the house after rolling down the mountain."

"The ocean was finally at rest."

"Now that we're all in agreement, we can put that issue to rest."
Rest as a noun (euphemistic, uncountable):

A final position after death.

Examples:

"She was laid to rest in the village cemetery."
Rest as a noun (music, countable):

A pause of a specified length in a piece of music.

Examples:

"Remember there's a rest at the end of the fourth bar."
Rest as a noun (music, countable):

A written symbol indicating such a pause in a musical score such as in sheet music.
Rest as a noun (physics, uncountable):

Absence of motion.

Examples:

"The body's centre of gravity may affect its state of rest."
Rest as a noun (snooker, countable):

A stick with a U-, V- or X-shaped head used to support the tip of a cue when the cue ball is otherwise out of reach.

Examples:

"Higgins can't quite reach the white with his cue, so he'll be using the rest."
Rest as a noun (countable):

Any object designed to be used to support something else.

Examples:

"She put the phone receiver back in its rest."

"He placed his hands on the arm rests of the chair."
Rest as a noun:

A projection from the right side of the cuirass of armour, serving to support the lance.
Rest as a noun:

A place where one may rest, either temporarily, as in an inn, or permanently, as, in an abode.
Rest as a noun (poetry):

A short pause in reading poetry; a caesura.
Rest as a noun:

The striking of a balance at regular intervals in a running account. Often, specifically, the intervals after which compound interest is added to capital.
Rest as a noun (dated):

A set or game at tennis.

Rest as a verb (intransitive):

To cease from action, motion, work, or performance of any kind; stop; desist; be without motion.
Rest as a verb (intransitive):

To come to a pause or an end; end.
Rest as a verb (intransitive):

To be free from that which harasses or disturbs; be quiet or still; be undisturbed.
Rest as a verb (intransitive, transitive, reflexive):

To be or to put into a state of rest.

Examples:

"My day's work is over; now I will rest. We need to rest the horses before we ride any further. I shall not rest until I have uncovered the truth. Rest assured that I will do my best."
Rest as a verb (intransitive):

To stay, remain, be situated.

Examples:

"The blame seems to rest with your father."
Rest as a verb (transitive, intransitive, reflexive):

To lean, lie, or lay.

Examples:

"A column rests on its pedestal."

"I rested my head in my hands. She rested against my shoulder. I rested against the wall for a minute."
Rest as a verb (intransitive, transitive, legal, US):

To complete one's active advocacy in a trial or other proceeding, and thus to wait for the outcome (however, one is still generally available to answer questions, etc.)

Examples:

"The defense rests, your Honor. I rest my case."
Rest as a verb (intransitive):

To sleep; slumber.
Rest as a verb (intransitive):

To lie dormant.
Rest as a verb (intransitive):

To sleep the final sleep; sleep in death; die; be dead.
Rest as a verb (intransitive):

To rely or depend on.

Examples:

"The decision rests on getting a bank loan."
Rest as a verb:

To be satisfied; to acquiesce.

Rest as a noun (uncountable):

That which remains.

Examples:

"She ate some of the food, but was not hungry enough to eat it all, so she put the rest in the refrigerator to finish later."
Rest as a noun:

Those not included in a proposition or description; the remainder; others.
Rest as a noun (UK, finance):

A surplus held as a reserved fund by a bank to equalize its dividends, etc.; in the , the balance of assets above liabilities.

Rest as a verb (obsolete):

To remain.

Rest as a verb (obsolete):

To arrest.

The difference between Remain and Rest

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