noun, takes する, transitive verb

  1. incision, operation, section.

Variations

Pronunciation Kanji Kana Is Common
切開 せっかい

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)
open, unfold, unseal
カイ ひら.く あ.く (3rd, N4)
gate, counter for cannons
モン かど と (2nd, N2)
open, initiate, begin
one, one radical (no.1)
イチ いっ ひと- (1st, N5)
twenty, twenty or letter H radical (no. 55)
キョウ ク にじゅう (Kentei 1)