When an adverb is constructed from an adjective ending in ant or ent,
the final nt of the masculine adjective is replaced with not just ment
but mment.
Adjectives with –ant, -ent endings
Adverb
abondant
abondamment
abundantly
brillant
brillamment
brilliantly
constant
constamment
constantly
courant
couramment
fluently
décent
décemment
decently
évident
évidemment
evidently
fréquent
fréquemment
frequently
patient
patiemment
patiently
prudent
prudemment
wisely
Exceptions:
présent
présentement
presently
véhément
véhémentement
vehemently
lent
lentement
slowly
The final e of these adjectives is converted to é in forming
these adverbs.
Feminine Adjective
Adverb
aveugle
aveuglément
blindly
commune
communément
commonly
énorme
énormément
enormously
opportune
opportunément
opportunely
précise
précisément
precisely
profonde
profondément
profoundly
uniforme
uniformément
uniformly
The following two are irregular. Briévementtakes
its spelling from brief - an archaic version of brève.