This is from the Online Etymology Dictionary. The suffix "ship" denotes a state or condition of being.
-ship
word-forming element meaning "quality, condition; act, power, skill; office, position; relation between," Middle English
-schipe, from Old English
-sciepe, Anglian
-scip "state, condition of being," from Proto-Germanic
*-skapaz (cognates: Old Norse
-skapr, Danish
-skab, Old Frisian
-skip, Dutch
-schap, German
-schaft), from
*skap- "to create, ordain, appoint," from PIE root
*(s)kep- (see
shape (v.)).