מָר
From LSJ
Σιγᾶν ἄμεινον ἢ λαλεῖν, ἃ μὴ πρέπει → Decet tacere quam loqui, quae non decet → Schweig besser still, als dass du sagst, was du nicht darfst
English (Strong)
or (feminine) marah; from מָרַר; bitter (literally or figuratively); also (as noun) bitterness, or (adverbially) bitterly: + angry, bitter(-ly, -ness), chafed, discontented, X great, heavy.
