root, cause, source, origin

to discover, to find (e.g. an error in a book); to find (e.g. something missing)

to discover, to find (e.g. an error in a book) / to find (e.g. something missing)

Alternative form of 見付ける

important, significant

importance, consequence, significance

question, problem on homework etc. / a question; a matter (of time etc.) / a problem (something that needs to be dealt with); a trouble / an issue; a matter

fundamental, radical, basic

importance

set of problems