Worry

1. v. i. To feel or express undue care and anxiety; to manifest disquietude or pain; to be fretful; to chafe; as, the child worries; the horse worries.
2. v. t. To harass by pursuit and barking; to attack repeatedly; also, to tear or mangle with the teeth.
3. v. t. To harass or beset with importunity, or with care an anxiety; to vex; to annoy; to torment; to tease; to fret; to trouble; to plague.
4. v. t. To harass with labor; to fatigue.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.