What does 決する mean?
決する is a Japanese verb meaning “to decide; to determine; to resolve; to be decided” in English. It can also be translated as “to break and overflow (e.g. levee)” depending on context. It is written as 決する in kanji, けっする in hiragana, and kessuru in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
まだどちらと決したわけではありませんので、引き続き成り行きを見守りたいと思います。
I haven't decided either way. I want to keep an eye on how things go.