noun, takes する, intransitive verb

Messages.yoji.
  1. diligent application (to work or study), cultivating one's character by studying hard.
  2. mutual encouragement (to improve), working hard together, friendly rivalry.

Variations

Pronunciation Kanji Kana Is Common
切磋琢磨 せっさたくま
切瑳琢磨 せっさたくま

Contained Kanji Breakdown

cut, cutoff, be sharp
き.る セツ サイ (2nd, N4)
seven
なな シチ なの (1st, N5)
sword, saber, knife
かたな トウ ち (2nd, N1)
polish
サ みが.く (Kentei 1)
stone
いし セキ シャク (1st, N3)
left hand, cliff(厂) variant
mouth
くち コウ ク (1st, N4)
distinction, difference, variation
サ さ.す (4th, N3)
sheep(羊) variant
to divide
king, rule, magnate
オウ -ノウ おお (1st, N3)
craft, construction, katakana e radical (no. 48)
コウ ク もく (2nd, N4)
polish
タク みが.く あや (Kentei Pre-1, N1)
king, rule, magnate
オウ -ノウ おお (1st, N3)
pig, hog, pig radical (no. 152)
 (Kentei 1)
grind, polish, scour
みが.く マ す.る (9th, N2)
hemp, flax, numb
あさ マ あ (9th, N1)
dotted cliff radical (no. 53)
ゲン (Kentei 1)
wild goose, trailing cliff radical (no. 27)
カン かりがね (Kentei 1)
grove, forest
リン はやし し (1st, N2)
tree, wood
き モク こ- (1st, N5)
stone
いし セキ シャク (1st, N3)
left hand, cliff(厂) variant
mouth
くち コウ ク (1st, N4)