Greek: ωφελιμος [ôphelimos] (Adjective). Profitable, beneficial, serviceable, useful.

ωφελιμος [ôphelimos] appears 4 times in the NT:

(1, 2) 1 Timothy 4: 8
For bodily exercise profiteth¹ little*: but godliness is profitable¹ unto all things, having promise of the life that now is, and of that which is to come. - ¹ωφελιμος [ôphelimos] Nom. sing. masc. (*"profiteth little" - προς ολιγον εστιν ωφελιμος [pros oligon estin ôphelimos ] Lit: "toward few is profitable").

(3) 2 Timothy 3: 16
All scripture is given by inspiration of God, and [is] profitable for doctrine, for reproof, for correction, for instruction in righteousness: - ωφελιμος [ôphelimos] Nom. sing. masc.

(4) Titus 3: 8
This is a faithful saying, and these things I will that thou affirm constantly, that they which have believed in God might be careful to maintain good works. These things are good and profitable unto men. - ωφελιμα [ôphelima] Nom. pl. neuter.