Similar words
fils
Fils is your biological son; gendre is a son-in-law, gained through marriage.
Similar in other languages
Spanish
yerno
yerno is the Spanish word for the same thing — both mean "son-in-law."
Portuguese
genro
genro is the Portuguese word for the same thing — both mean "son-in-law."
Practice
1 What does gendre mean?
son-in-law
2 Fill the gap: Le ___ aide son beau-père au jardin.
Full sentence: Le gendre aide son beau-père au jardin. (The son-in-law helps his father-in-law in the garden.)
3 Which fingerprint chart matches gendre?
gendre: neutral register, common frequency, general domain, neutral connotation.