précieux

/pʁe.sjø/
1.
adjectivemasculineSing

valuable

precious

Fais attention, ce collier est très précieux.

Be careful, this necklace is very valuable.

2.
adjectivemasculineSing

very helpful

invaluable

Ton soutien a été précieux ces dernières semaines.

Your support has been invaluable these past weeks.

3.
adjectivemasculineSing

affected

overly refined or mannered (pejorative)

Son style d'écriture est un peu précieux ; ça sonne maniéré.

His writing style is a bit precious; it sounds affected.