Dictionary entry

πικρός

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

πικρός, -ά, -όν

(poët. in cl.), [in LXX chiefly for מַר;]

1. sharp, pointed.

2. sharp to the senses; of taste, bitter: opp. to γλυκύ, Ja 3:11; metaph., harsh, bitter: Ja 3:14.