This is the 3096th most frequent Japanese word.
仮
Temporary; provisional; intermediate.
Here, '仮' is used as an adjective meaning 'provisional' or 'temporary', describing the nature of the conclusion as not yet final.
この結論は仮のものです。
This conclusion is provisional.
In this sentence, '仮に' is used as an adverb meaning 'supposing' or 'assuming', introducing a hypothetical scenario.
仮にそれが事実だとしたら、どうしますか？
What would you do if we assume that it is true?
Here, '仮面' combines '仮', meaning 'temporary or false', with '面', meaning 'face', to refer to a 'mask', suggesting something worn to conceal true identity.