Godan verb with 'ru' ending, Transitive verb
to know; to be aware (of); to be conscious (of); to learn (of); to find out; to discover
あなたは１９９０年から彼女を知っているのですか？Have you known her since 1990? to sense; to feel; to notice; to realize
to understand; to comprehend; to grasp; to appreciate
to remember; to be familiar with; to be acquainted with
to experience; to go through; to know (e.g. hardship)
to get acquainted with (a person); to get to know
to have to do with; to be concerned with; to be one's concern; to be one's responsibility
usu. with neg. sentence
Also written 識る【しる】