ἐὰν [163 verses](conj) "If" is ean, which is a conditional particle (derived from ei (if) and an (possibly), which makes reference to a time and experience in the future that introduces but does not determine an event. This is how we use the word "when." It can be used after a demonstrative pronoun hos or hostis meaning "that possibly,"  "whosoever" or "whatsoever."- (CW) "If" is from a word meaning "when" because it indicates more of an expectation of something happening than "if" alone.  It can be used after a demonstrative pronoun to mean "that possibly," "whosoever," or "whatsoever." This is not the simple "if." CW - Confusing Word -- The "if" does not capture the word's specific meaning.