Most adjectives ending in -al change to -aux (masculine plural) or -ales (feminine plural) - see Forming the plural of adjectives ending in -al in French - but there are exceptions to that rule.
The plural form of some adjectives ending in -al in French
Look at these cases:
The following adjectives are exceptions which take -s in the masculine plural form:
Masculine singular | Masculine plural | English |
banal | banals | banal / ordinary |
bancal | bancals | wobbly / rickety |
fatal | fatals | fatal / lethal |
naval | navals | naval |
natal | natals | natal |
glacial | glacials / glaciaux | freezing |
final | finals / finaux | final |
ATTENTION:
Both plural forms of glacial and final are accepted in French: regular (glaciaux / finaux) and irregular (glacials / finals)
See also Forming the plural of French nouns ending in -al
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