FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

kalos καλός — kal-os' — of uncertain affinity; properly, beautiful, but chiefly (figuratively) good (literally or morally), i.e. valuable or virtuous (for appearance or use, and thus distinguished from 18, which is properly intrinsic):--X better, fair, good(-ly), honest, meet, well, worthy.

see GREEK for 18