Pluriel des adjectifs

la règle générale:

1.  SINGULIER + –S = PLURIEL             fou–fous, bleu–bleus

2. –s, –x    –s, x                                 gros–gros

3. –eau  –eaux                               beau–beaux

4. –al   –aux                                   amical–amicaux

MAIS! final – finals, fatal – fatals, glacial – glacials