1. convenient, useful, handy, helpful

noun (common) (futsuumeishi) adjectival nouns or quasi-adjectives (keiyodoshi)

2. finding useful, coming in handy, using often

noun (common) (futsuumeishi) noun or participle which takes the aux. verb suru transitive verb

3. (priceless) treasure

noun (common) (futsuumeishi)