דערקונדיקן

R' Aharon Shmuel Tamares uses this word (in daytshmerish form, ערקונדיגן) several times in his autobiographical essay (available in Yiddish in the anthology פּציפיזם לאור התורה) to mean "to find out, realize" -- probably he's confusing it with the German word "erkunden" -- but just worth noting, in case other Yiddish authors make the same substitution.