terms |
unsustaining |
As a noun terms
is .
As an adjective unsustaining is
that does not sustain.
sustain |
unsustaining |
As a noun sustain
is (music) a mechanism which can be used to hold a note, as the right pedal on a piano.
As a verb sustain
is to maintain, or keep in existence.
As an adjective unsustaining is
that does not sustain.