adjective - positioned on a high place or on the edge of something, often in a way that seems temporary or slightly unstable
noun, formal - the process of familiarizing someone with a new place, situation, or system, or the ability to understand your position or direction
verb - to contain many faults, inconsistencies, or weaknesses; to be badly constructed or easy to disprove because of numerous gaps or errors
verb, technical - (especially of a bank or lender) to take back property because the borrower has failed to make payments on a loan
noun - an animal or human in the early stages of development before birth, especially before all the main body parts are formed