know
From Mark Abley's book Spoken Here about endangered languages:
The Inuktitut language goes further, much further. Inuit distinguish utsimavaa (he or she knows from experience), sanatuuq (he or she knows how to do something), qaujimavaa (he or she knows about something), nalujunnaipaa (he or she is not ignorant of something), nalunaiqpaa (he or she is no longer unaware of something), and two or three other verbs that mean, roughly speaking, "know".
Or, as Mark Abley inexplicably failed to put it, the Inuit have eight different words for know.