(intransitive, nautical, also figuratively) Of a vessel: to roll so far on its side that it cannot recover; to capsize or turn turtle.

(idiomatic) More complex or confusing than one can understand; beyond one’s comprehension. / (idiomatic) More than one can handle; too much (especially in over one's head).

(idiomatic) To guard and protect.

(transitive, idiomatic) To persuade someone, gain someone's support, or make someone understand the truth or validity of something.

(transitive, idiomatic) To relinquish control or possession of something to someone. / (transitive, idiomatic) To deliver (someone to an enemy, police, etc.).

An excessive and dangerous dose of a drug.

(transitive) To dose to excess; to give an overdose, or too many doses, to. / (intransitive) To dose excessively, to take an overdose. / (intransitive, figuratively) To indulge in something excessively.

To turn over (soil, hay, etc.) with a gardening fork. / (idiomatic, US) To pay (implies lots of money).

To blow on something causing it to topple. / To be knocked down by wind. / (idiomatic) To pass naturally; to go away; to calm down or subside. / To overwhelm.

Used other than figuratively or idiomatically: see bend over, backwards. / (idiomatic, informal) To make a great effort; to take extraordinary care; to go to great lengths.