The difference between Merciful and Safe

When used as adjectives, merciful means showing mercy, whereas safe means not in danger.

Safe is also noun with the meaning: a box, usually made of metal, in which valuables can be locked for safekeeping.

Safe is also verb with the meaning: to make something safe.

check bellow for the other definitions of Merciful and Safe

Safe as an adjective:

Not in danger; out of harm's reach.

Examples:

"You’ll be safe here."
Safe as an adjective:

Free from risk; harmless, riskless.

Examples:

"It’s safe to eat this."
Safe as an adjective:

Providing protection from danger; providing shelter.

Examples:

"We have to find a safe spot, where we can hide out until this is over."
Safe as an adjective (baseball):

When a batter successfully reaches first base, or when a baserunner successfully advances to the next base or returns to the base he last occupied; not out.

Examples:

"The pitcher attempted to pick off the runner at first, but he was safe."
Safe as an adjective:

Properly secured; secure.

Examples:

"The documents are safe."
Safe as an adjective (used after a noun, often, forming a compound):

Not susceptible to a specified source of harm.

Examples:

"dishwasher safe; dishwasher-safe'"
Safe as an adjective (UK, slang):

Great, cool, awesome, respectable;
Safe as an adjective:

(slang) Lenient, usually describing a teacher that is easy-going.
Safe as an adjective:

Reliable.
Safe as an adjective:

Cautious.

Safe as a noun:

A box, usually made of metal, in which valuables can be locked for safekeeping.
Safe as a noun (slang):

A condom.
Safe as a noun (dated):

A ventilated or refrigerated chest or closet for securing provisions from noxious animals or insects.