tenuis

noun

ten·​u·​is ˈten-yə-wəs 

plural tenues ˈten-yə-ˌwēz 

-ˌwās

: an unaspirated voiceless stop

Word History

Etymology

borrowed from Medieval Latin (as translation of Greek psīlós "bare, plain," applied to the consonants π, τ, κ), going back to Latin, "thin, narrow, slight" — more at thin entry 1

First Known Use

1650, in the meaning defined above