tweak

US /twiːk/
UK /twiːk/
1.

tweak

a sharp twist or pull.

:
an affectionate tweak
2.

tweak

a fine adjustment to a mechanism or system.

:
no tweaks were required
1.

tweak

twist or pull (something) sharply.

:
he tweaked the boy's ear
2.

tweak

improve (a mechanism or system) by making fine adjustments to it.

:
engineers tweak the car's operating systems during the race