Labor

The Latin verb lābor means “I fall” or “I slip”. This sense remains in English today especially in form -lapse. One obvious example is lapse. Although it has many meanings, they are more or less related to the sense “falling away”.

Another example is collapse, which is the combination of con- (that gets assimilated before l and that indicates the completeness) and lapse, and means “to fall down suddenly”. There are a couple of more similar words: elapse (meaning “(of time) to slip by, pass away”), relapse (meaning “an act of falling back into an undesirable state”).