为止

为止	wéi zhǐ	until / (used in combination with words like 到 or 至 in constructs of the form 到...到...为止)
为	wéi	as (in the capacity of) / to take sth as / to act as / to serve as / to behave as / to become / to be / to do / by (in the passive voice)
为	wèi	because of / for / to
为	wéi	variant of 为
为	wèi	variant of 为
止	zhǐ	to stop / to prohibit / until / only