ichidan verb, transitive verb
Almost exclusively used in the negative form 解せない (げせない) to express that something is incomprehensible or puzzling. The affirmative form is rare in modern Japanese.
See also: 解せない
彼の行動はどうも解せない。
I just can't understand his behavior.
その説明では解せない点が多い。
There are many points in that explanation that are hard to comprehend.