Origin: 1825–35; < L
reticent- (s. of
reticēns), prp. of
reticēre to be silent, equiv. to
re- re- +
-tic-, comb. form of
tacēre to be silent (
cf. tacit ) +
-ent- -ent 
Related forms: ret⋅i⋅cence, ret⋅i⋅cen⋅cy, noun
ret⋅i⋅cent⋅ly, adverb
Synonyms:
1. taciturn, quiet, uncommunicative.
Antonyms:
1. talkative, voluble.
[ret-uh-suh