un·screw 
/ˌʌnˈskru:/ verb
un·screws; un·screwed; un·screw·ing /ˌʌnˈskru:/ verb 1 : to loosen and remove (something) by turning it [+ obj] ▪ unscrew a light bulb ▪ I unscrewed the jar lid. [no obj] ▪ The lid unscrews easily. 2 [+ obj] : to remove the screws from (something)
▪ You'll need to unscrew the cover before you remove it.
▪ You'll need to unscrew the cover before you remove it.
