compound of the infinitive mancare with la

compound of the infinitive mancare with le

compound of the infinitive mancare with lo

(idiomatic) to feel lost or lacking support

to be one brick short of a full load, to be a shingle short, to be a few sandwiches short of a picnic, to be one card shy of a full deck, to have a screw loose, to have bats in one's belfry, etc. (to be mentally insane, mad, crazy)