to cross over; used very widely of any transition (literal or figurative; transitive, intransitive, intensive, causative); specifically, to cover (in copulation)

properly, to be rubbed or worn; hence (figuratively) to be weak, sick, afflicted; or (causatively) to grieve, make sick; also to stroke (in flattering), entreat

properly, vehemence, i.e. (with or without preposition) vehemently; by implication, wholly, speedily, etc. (often with other words as an intensive or superlative; especially when repeated)