gound
Gound (noun) means the sticky liquid that collects in your eyes while you sleep.
Etymology
Came into English via Middle English gounde, gownde, from Old English gund ("matter, pus, poison"), from Proto-West Germanic *gund, from Proto-Germanic *gundaz ("sore, boil"), ultimately from Proto-Indo-European *gʰendʰ- ("ulcer, sore, abscess, boil"). It is cognate with Old High German gunt ("purulent matter") and dialectal Norwegian gund ("the scab of an ulcer").