nail (e.g. fingernail, toenail); claw; plectrum; pick; hook; clasp
to bite; to chew; to gnaw; to fumble one's words (esp. during a play, broadcast, etc.); to falter with one's words; to crash against (e.g. of waves); to break onto (shore)
habit (often a bad habit, i.e. vice); tendency; peculiarity; idiosyncrasy; crease; wrinkle