reticent

As adjectives the difference between mysterious and reticent

is that mysterious is of unknown origin while reticent is reluctant; reticent.

As adjectives the difference between reticent and bemused

is that reticent is reluctant; reticent while bemused is deeply thoughtful; preoccupied.

As a verb bemused is

(bemuse).

As adjectives the difference between reticent and false

is that reticent is reluctant; reticent while false is (label) one of two states of a boolean variable; logic.

As adjectives the difference between incredulous and reticent

is that incredulous is skeptical, disbelieving, or unable to believe while reticent is reluctant; reticent.

As a verb restrain

is   to control or keep in check.

As an adjective reticent is

reluctant; reticent.

As adjectives the difference between friendly and reticent

is that friendly is generally warm, approachable and easy to relate with in character while reticent is reluctant; reticent.

As an adverb friendly

is in a friendly manner, like a friend.

As a noun friendly

is (sports) a game which is of no consequence in terms of ranking, betting etc.

As adjectives the difference between reticent and recent

is that reticent is reluctant; reticent while recent is recent.

As adjectives the difference between reticent and esoteric

is that reticent is reluctant; reticent while esoteric is intended for or likely to be understood by only a small number of people with a specialized knowledge or interest, or an enlightened inner circle.