couldn't figure out, couldn't get a sense of, couldn't get in touch
→ 付く
verb · informal, past tenseRare#28,589
couldn't figure out, couldn't get a sense ofOften used in expressions such as 想像がつかなかった (couldn't imagine) and 見分けがつかなかった (couldn't tell the difference).
JA: 値段は見当もつかなかった。
EN: I couldn't even guess the price.
couldn't get in touchUsed in the expression 連絡がつかなかった.
JA: 何度電話しても連絡がつかなかった。
EN: No matter how many times I called, I couldn't get in touch.