Ist = to be -- 3rd person singular present tense

ig = adverb making suffix (not sure what this is doing in here, mebbe NW knows)

keit = ness

war = to be -- 3rd person singular past tense

wird = to become -- 3rd person singular present tense - periphrastic future marker, takes infinitive

sein = to be -- infinitive

PS
Forget hessenpfeiffer Sounds like a Hessian piper. What you know is Hassenpfeffer, peppered hare (yum)