'availably' originates from English, specifically the adjective 'available', which is formed from the verb/root 'avail' ultimately from Latin 'valēre' meaning 'to be strong, to be worth.'

'available' entered English via Old French/Anglo-French (medieval forms like 'available' or related adjectival forms) and Middle English; the adverbial form 'availably' is a later derivation built on the English adjective 'available.'

Initially related to the root meaning 'to be of use or have value,' the word evolved to mean 'able to be used or obtained'; the adverbial form describes that state or manner (i.e., 'in a way that is available').