Dictionary: Strong's Hebrew & Greek Dictionary
ean eh-an' from 1487 and 302; a conditional particle; in case that, provided, etc.; often used in connection with other particles to denote indefiniteness or uncertainty:
before, but, except, (and) if, (if) so, (what-, whither-)soever, though, when (-soever), whether (or), to whom, (who-)so(-ever). See 3361.