from ἰσχύς; to have (or exercise) force (literally or figuratively):--be able, avail, can do(-not), could, be good, might, prevail, be of strength, be whole, + much work.
from ὑγιής; to have sound health, i.e. be well (in body); figuratively, to be uncorrupt (true in doctrine):--be in health, (be safe and) sound, (be) whole(-some).
from the base of χράομαι or χρή; employment, i.e. an affair; also (by implication) occasion, demand, requirement or destitution:--business, lack, necessary(-ity), need(-ful), use, want.