Correct spelling for the English word "viger" is [vˈa͡ɪd͡ʒə], [vˈaɪdʒə], [v_ˈaɪ_dʒ_ə] (IPA phonetic alphabet).
There doesn't appear to be a widely recognized term "viger" in English or any other language. It could be a misspelling or a very obscure word. It's possible that the word you are referring to is "vigour", which has a different spelling. However, the etymology of "vigour" as a term has roots in Latin. The word "vigor" comes from the Latin "vigor" meaning "liveliness" or "activity". It eventually made its way into Old French as "vigueur" before being adopted into English.