the word 'theretofore' is a compound adverb formed within middle english by combining three old english elements. 'there' originates from the old english demonstrative 'þǣr', which itself stems from proto-germanic þar and ultimately from the proto-indo-European demonstrative root to-. 'to' comes from old english 'tō', a preposition with a wide range of directional and relational uses, traceable to proto-germanic tō. 'fore' derives from old english 'fore', meaning 'before', related to proto-germanic fura and the proto-indo-European per- meaning 'forward, through'. the compound's literal sense, 'to that before', evolved into its modern, formal meaning of 'up until that preceding time', serving as a temporal connector primarily used in legal and formal historical contexts.

Structure: there + to + fore there (old english, demonstrative adverb meaning 'in or at that place'); to (old english, preposition indicating direction or relation); fore (old english, adverb meaning 'before in time, position, or order').