The difference between Afflict and Vex

When used as verbs, afflict means to cause (someone) pain, suffering or distress, whereas vex means to trouble aggressively, to harass.

Vex is also noun with the meaning: a trouble.

check bellow for the other definitions of Afflict and Vex

Afflict as a verb (transitive):

To cause (someone) pain, suffering or distress.
Afflict as a verb (obsolete):

To strike or cast down; to overthrow.
Afflict as a verb (obsolete):

To make low or humble.

Examples:

"rfquotek Edmund Spenser"

Vex as a verb (transitive, now, _, rare):

To trouble aggressively, to harass.
Vex as a verb (transitive):

To annoy, irritate.

Examples:

"Billy's professor was vexed by his continued failure to improve his [[grade]]s."
Vex as a verb (transitive):

To cause (mental) suffering to; to distress.
Vex as a verb (transitive, rare):

To twist, to weave.
Vex as a verb (intransitive, obsolete):

To be irritated; to fret.

Examples:

"rfquotek Chapman"
Vex as a verb (transitive):

To toss back and forth; to agitate; to disquiet.