week·night 
(wēknīt′)
(wēknīt′)n.
Any of the nights of the week other than weekend nights.
weeknights′ adv.
- cardinalship
- cardinal virtue
- cardio
- cardio-
- cardioacceleration
- cardioaccelerator
- cardiogenic
- cardiogram
- cardiograph
- cardiography
- cardioid
- cardiolipin
- cardiological
- cardiologist
- cardiology
- somniferous
- somniferously
- somnific
- somniloquist
- somniloquy
- somnolence
- somnolent
- somnolently
- somoni
- Somoza Debayle