合が点てんがいく

expression, godan verb (iku/yuku class)

understand; make sense of; get it

Often used in negative or question forms to express that something doesn't make sense or is hard to accept. Slightly old-fashioned but still common in everyday speech.

• 彼かれの説せつ明めいはどうも合が点てんがいかない。

  His explanation just doesn't make sense to me.

• その話はなし、合が点てんがいった？

  Did that story make sense to you?