im·pu·is·sance 
(ĭm-pyĭ-səns, ĭm-pwĭsəns)
(ĭm-pyĭ-səns, ĭm-pwĭsəns)n.
Lack of power or effectiveness; weakness.
[Middle English impuissaunce, from Old French impuissance : in-, not; see IN-1 + puissance, power; see PUISSANCE.]
im·puis·sant adj.
- disabled list
- disablement
- disabling
- disablingly
- disabuse
- disaccharidase
- disaccharide
- disaccord
- disaccustom
- disadvantage
- disadvantaged
- disadvantagedness
- disadvantageous
- disadvantageously
- disaffect
- disaffected
- disaffectedly
- disaffection
- disaffiliate
- disaffiliation
- disaffirm
- disaffirmance
- disaffirmation
- disaggregate
- disaggregation