(of contracts, services, etc) having the property of retaining or retainment
retainership in American English
(rɪˈteinərˌʃɪp)
noun
the condition of being a retainer or of having retainers
Word origin
[1560–70; retainer1 + -ship]This word is first recorded in the period 1560–70. Other words that entered Englishat around the same time include: acute, clinch, event, ritual, sector-ship is a native English suffix of nouns denoting condition, character, office, skill,etc. Other words that use the affix -ship include: clerkship, friendship, statesmanship