Godan verb with 'ru' ending, Intransitive verb
to arrive at (e.g. a decision); to reach (a stage); to attain
その語は広い意味を持つに至った。The word has acquired a broad meaning. to lead to (a place); to get to
in the extreme case of
as ～に至っては
to come; to arrive; to result in
Archaic
Also written 到る【いたる】