Vocabulary consisting only from characters you are able to read
足りない
たりない
(1)insufficient/not enough/lacking/ (2)dim-witted/slow/one brick short of a full load adj
貝
かい
(1)(uk) Japanese babylon (species of shelled mollusk, Babylonia japonica), Japanese ivory shell, (2)(abbr) spinning top (traditionally made from a Japanese babylon shell)
耳にする
みみにする
to hear, to hear by chance, to hear by accident, to catch (the sound)suru