reserve

[1]	keep/hold (back) , withhold , save , set/put aside , conserve , preserve , retain , keep (to/for oneself) , hold over , postpone , delay , put off , defer
[2]	hold , keep , book , register , save , put/set aside , charter , engage , secure , contract for
[3]	allow , appropriate , earmark , set aside
[4]	hold , book

[1]	modesty
[2]	backlog , stockpile
[3]	substitute , reserves , store , second-stringer , stock , stockpile , inventory , supply , nest egg , reservoir , fund , hoard , cache
[4]	reticence , (self-)restraint , (self-)control , taciturnity , aplomb , formality , coolness , aloofness , guardedness , standoffishness , remoteness , detachment
[5]	reserves , reservation , auxiliary , alternate , substitute , reinforcements , backup , spare
[6]	reservation , military reserve , restriction , restraint , hesitancy , hesitation , limit , limitation , hedging , avoidance , evasion , dodging , fudging
[7]	in reserve , reticence , taciturnity , ready , in readiness , on hand , available , on call , accessible , as backup , in store , on tap , at (one's) fingertips