This is the 10448th most frequent French word.
laissés
"Left" or "abandoned."
Laissés is used here as a past participle agreeing in number and gender with the direct object 'cadeaux'.
Ils ont laissés des cadeaux sous le sapin.
They left some gifts under the Christmas tree.
Laissés is used as a past participle serving as an attribute for 'enfants', describing their state.
Les enfants laissés seuls sont inquiets.
The children left alone are worried.
Laissés is the past participle used reflexively to describe the action performed by the subject on themselves.