firm
Not liable to fluctuate or especially to fall.
“stocks are still firm”
Not soft or yielding to pressure.
“a firm mattress”
“the snow was firm underfoot”
Not subject to revision or change.
“a firm contract”
“a firm offer”
(of especially a person's physical features) not shaking or trembling.
“his voice was firm and confident”
“a firm step”
Possessing the tone and resiliency of healthy tissue.
“firm muscles”
Securely established.
“holds a firm position as the country's leading poet”
Unwavering in devotion to friend or vow or cause.
“a firm ally”
Marked by firm determination or resolution; not shakable.
“firm convictions”
“a firm mouth”
Securely fixed in place.
“the post was still firm after being hit by the car”
Strong and sure.
“a firm grasp”
The members of a business organization that owns or operates one or more establishments.
With resolute determination.
“we firmly believed it”
“you must stand firm”
Make taut or tauter.
Become taut or tauter.
“Your muscles will firm when you exercise regularly”