exert /ig-zûrtˈ/

1. To cause (oneself) to make a strenuous (esp physical) effort
2. To bring into active operation
3. To put forth (obsolete)
4. To do or perform (obsolete)

exerˈtion noun

1. A bringing into active operation
2. Striving
3. Strenuous activity

exertˈive adjective

1. Having the power or tendency to exert
2. Using exertion

• nightless
• night letter
• night letters
• nightlife
• nightlifes
• night-light
• night-lights
• night-line
• night-lines
• nightlong
• nightly
• night-man
• nightmare
• nightmares
• nightmarish
• nightmarishly
• nightmarishness
• nightmarishnesses
• nightmary
• night-men
• night-night
• night nurse
• night nurses
• night out
• night outs