Luke 6:43 “No good (kalos/towb) tree bears bad fruit, nor does a bad tree bear good (kalos) fruit. 44 Each tree is recognized by its own fruit..."
kalos -- " 'beautiful' ... of quality, in accordance with the purpose of something or someone, 'good, useful.' In the physical sense, 'free from defects, fine, precious' ... 'morally good, noble, praiseworthy, contributing to salvation,' etc."
towb -- pleasant (to the higher nature), good, agreeable (to the senses), excellent (of its kind), rich, valuable in estimation, appropriate, becoming, better (comparative), glad, happy, prosperous, good understanding (of man's intellectual nature), good, kind