unwilling to tell people about things synonym reserved, uncommunicative寡言少語;不願與人交談;有保留 She was shy and reticent. 她羞怯而寡言少語。 - reticent about something
He was extremely reticent about his personal life. 他對自己的私人生活諱莫如深。
Word Originmid 19th cent.: from Latin reticent- ‘remaining silent’, from the verb reticere, from re- (expressing intensive force) + tacere ‘be silent’.