ETYMOLOGY
from un- + plausive (expressive of approval or praise),
from Latin plaus-, ppl. stem of plaudere (to applaud) + -ive
EXAMPLE
“… Achilles stands i’th entrance of his Tent;
Please it our Generall to passe strangely by him,
As if he were forgot: and Princes all,
Lay negligent and loose regard vpon him;
I will come last,’tis like heele question me,
Why such vnplausiue eyes are bent? why turn’d on him?
If so, I haue derision medicinable,
To vse betweene your strangenesse and his pride,
Which his owne will shall haue desire to drinke;
It may doe good, pride hath no other glasse
To show it selfe, but pride: for supple knees,
Feede arrogance, and are the proud mans fees. …”
From: The Tragedy of Troylus and Cressida
By William Shakespeare, 1609
Lexicophilia 