שִׂיד

From LSJ

εὐκαταφρόνητός ἐστι σιγηρὸς τρόπος → a way of life disposed to silence is contemptible (Menander)

Source

English (Strong)

a primitive root probably meaning to boil up (compare שׁוּד); used only as denominative from שִׂיד; to plaster: plaister.
from שִׂיד; lime (as boiling when slacked): lime, plaister.