Renitent
Renitent (-tent) , adjective
[Latin renitens, -entis, present participle of renit to strive or struggle against, resist; pref. re- re- + niti to struggle or strive: compare French rénitent.]
1.
Resisting pressure or the effect of it; acting against impulse by elastic force.
[Muscles] soft and yet renitent.
2.
Persistently opposed.