firmly

As adverbs the difference between plainly and firmly

is that plainly is in a plain manner; simply; basically while firmly is in a firm or definite or strong manner.

As adverbs the difference between firmly and immovably

is that firmly is in a firm or definite or strong manner while immovably is in an immovable manner.

As adverbs the difference between firmly and permanently

is that firmly is in a firm or definite or strong manner while permanently is in a permanent manner; lastingly.

As adverbs the difference between firmly and constantly

is that firmly is in a firm or definite or strong manner while constantly is with steadfastness; with resolve; in loyalty, faithfully.

As adverbs the difference between staunchly and firmly

is that staunchly is in a staunch manner while firmly is in a firm or definite or strong manner.

As adverbs the difference between firmly and gently

is that firmly is in a firm or definite or strong manner while gently is in a gentle manner.

As adverbs the difference between firmly and closely

is that firmly is in a firm or definite or strong manner while closely is in a close manner.

As adverbs the difference between firmly and sufficiently

is that firmly is in a firm or definite or strong manner while sufficiently is (manner) in a sufficient manner; enough.

Firmly is a related term of stiff.

As an adverb firmly

is in a firm or definite or strong manner.

As an adjective stiff is

of an object, rigid, hard to bend, inflexible.

As a noun stiff is

an average person, usually male, of no particular distinction, skill, or education, often a working stiff''''' or ''lucky '''stiff .

As a verb stiff is

to fail to pay that which one owes (implicitly or explicitly) to another, especially by departing hastily.