allonger

From a- +‎ long +‎ -er, or a Vulgar Latin root *allongō, from ad + Late Latin longō, from Latin longus.

• IPA^(key): /a.lɔ̃.ʒe/

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allonger

1. (transitive) to lay down
2. (transitive) to lengthen, to make longer, to extend
3. (transitive) to extend out, to stretch
4. (intransitive, of days) to lengthen
5. (reflexive) to grow, to get longer
6. (reflexive) to stretch out
7. (reflexive) To lie, to lie down

This is a regular -er verb, but the stem is written allonge- before endings that begin with -a- or -o- (to indicate that the -g- is a “soft” /ʒ/ and not a “hard” /ɡ/). This spelling-change occurs in all verbs in -ger, such as neiger and manger.

• allongé
• allongement
• long/longue

• “allonger” in le Trésor de la langue française informatisé (The Digitized Treasury of the French Language).

• rallonge, rallongé