from kratos, "strong" (which denotes power in activity and effect), serves as the comparative degree of agathos, "good" (good or fair, intrinsically). Kreisson is especially characteristic of the Epistle to the Hebrews, where it is used 12 times; it indicates what is (a) advantageous or useful, 1 Corinthians 7:9,38; 11:17; Hebrews 11:40; 12:24; 2 Peter 2:21; Philippians 1:23 , where it is coupled with mallon, "more," and pollo, "much, by far," "very far better" (RV); (b) excellent, Hebrews 1:4; 6:9; 7:7,19,22; 8:6; 9:23; 10:34; 11:16,35 .
the neuter of kalos, with mallon, "more," is used in Mark 9:42 , "it were better (lit., 'much better') for him if a great millstone were hanged about his neck." In verses Mark 9:43,45,47 , kalos is used alone (RV, "good," for AV, "better").
Note: In Luke 5:39 the most authentic texts have chrestos, "good," instead of the comparative, chrestoteros, "better."