understood without being openly stated; implicit
She and I share a tacit understanding that we will marry someday.
tacere (to be silent) (Latin)
tacit ~ take it; imagine you are giving permission to someone to take something from your room. but you didn't say it verbally but via your actions. Tacit - Change the word to Tact - You tactfully (with perfection)handled the situation even without expressing it in words (tacit). break it as taci -t = taxi. when u r waiting on road side. it implied, understood without being expressed that you need taxi tacit= take + it or you will have to take something which is not expresssed.