πικραίνω (pikraínōpik-rah'-ee-noverbto make bitter)
[Grk] πικραίνω LN: 79.42, 88.202 GK: G4393 Hebrew: כַּעַס, מָרַד, קָצַף, רָגַז
Derivation: from πικρός;
Strong's: to embitter (literally or figuratively)
KJV: --be (make) bitter.
See: πικρός