tacit
tac.it \'tas-*t\ aj [F or L; F tacite, fr. L tacitus silent, fr. pp. of
tace-reX to be silent; akin to OHG dage-n to be silent 1: expressed or
carried on without words or speech 2a: implied or indicated but not
actually expressed {~ consent} 2b1: arising without express contract or
agreement 2b2: arising by operation of law {~ mortgage} - tac.it.ly av
Webster's English Dictionary