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in the PONS Dictionary

I. fortifier [fɔʀtifje] VB trans

1. fortifier (rendre vigoureux):

fortifier
fortifier

2. fortifier (affermir):

fortifier (volonté)
fortifier (amitié)
fortifier qn dans sa conviction

3. fortifier MIL:

fortifier

II. fortifier [fɔʀtifje] VB intr (tonifier)

fortifier
fortifier

III. fortifier [fɔʀtifje] VB refl se fortifier

1. fortifier (devenir fort):

se fortifier
se fortifier

2. fortifier (après une maladie) personne:

se fortifier

3. fortifier (s'affermir) amitié, croyance, autorité:

se fortifier

4. fortifier MIL:

se fortifier
Présent
jefortifie
tufortifies
il/elle/onfortifie
nousfortifions
vousfortifiez
ils/ellesfortifient
Imparfait
jefortifiais
tufortifiais
il/elle/onfortifiait
nousfortifiions
vousfortifiiez
ils/ellesfortifiaient
Passé simple
jefortifiai
tufortifias
il/elle/onfortifia
nousfortifiâmes
vousfortifiâtes
ils/ellesfortifièrent
Futur simple
jefortifierai
tufortifieras
il/elle/onfortifiera
nousfortifierons
vousfortifierez
ils/ellesfortifieront