i·so·met·rics 
(ī′sə-mĕtrĭks)
(ī′sə-mĕtrĭks)n. (used with a sing. or pl. verb)
Exercise or a system of exercises in which isometric muscular contraction is used to strengthen and tone muscles, performed by the exertion of effort against resistance, usually of a stationary object.
- insultingly
- insuperability
- insuperable
- insuperably
- insupportable
- insupportably
- insuppressible
- insuppressibly
- insurability
- insurable
- insurance
- insure
- insured
- insurer
- insurgence
- insurgency
- insurgent
- insurgently
- insurmountability
- insurmountable
- insurmountableness
- insurmountably
- insurrection
- insurrectional
- insurrectionary