To give a valid excuse for past behavior.
To make plain, manifest, or intelligible; to clear of obscurity; to illustrate the meaning of.
To make something plain or intelligible.
To persistently bother (someone, or a group of people) physically or psychologically when such behaviour is illegal and/or unwanted, especially over an extended period.
To annoy (someone) frequently or systematically; to pester.
To trouble (someone, or a group of people) through repeated military-style attacks.
To put excessive burdens upon (someone); to subject (someone) to anxieties.