Extended Strong's Greek Lexicon (Abbott-Smith based)
rotten
Usage: σαπρός, -ά -όν [in Sm.: Lev.27:14, 33 * ;] rotten, corrupt, bad, worthless: of trees and fruit (opposite to ἀγαθός, καλός), Mat.7:17-18 12:33 Luk.6:43; of fish, Mat.13:48. Metaphorical, in moral sense: λόγος σ., Eph.4:29. "In Hellenistic . . . it became a synonym for αἰσχρός or κακός," MM, xxii.† (AS)