-hood

CIDE DICTIONARY

-hood,  [OE. hod, had, hed, hede, etc., person, rank, order, condition, AS. hād; akin to OS. hēd, OHG. heit, G. -heit, D. -heid, Goth. haidus manner; cf. Skr. kētu brightness, cit to appear, be noticeable, notice. -head.].

 A termination denoting state, condition, quality, character, totality, as in manhood, childhood, knighthood, brotherhood. Sometimes it is written, chiefly in obsolete words, in the form -head.  [1913 Webster]

OXFORD DICTIONARY

-hood, suffix forming nouns:
1 of condition or state (childhood; falsehood).
2 indicating a collection or group (sisterhood; neighbourhood).

Etymology

OE -had, orig. an independent noun, = person, condition, quality