Meaning: むなしくadv. (Kanji=空しく) vainly, in a vain manner; futilely, uselessly; conceitedlyadv. (Kanji=虚しく) in vain, to no purpose, fruitlessly, all for nothingadj. (Kanji=虚しい) void; vain, ineffective; empty, containing nothing; lifelessadj. (Kanji=空しい) vacant; futile, vain, worthless