adverb

counterclockwise

anti-clockwise

Turn the knob counterclockwise to open it.

Turn the knob anti-clockwise to open it.

The dancers moved in a counterclockwise circle.

The dancers moved in an anti-clockwise circle.

((adv.)) in the opposite direction to the way the hands of a clock move around Turn the dial counterclockwise.

((adj.)) moving in the opposite direction to the hands of a clock They made a counterclockwise turn.

Synonyms: anti-clockwise; Antonyms: clockwise

From the prefix 'counter-' (against, opposite) + 'clockwise' (in the direction of a clock's hands).

Think of 'counter' as meaning 'against'. So, it's 'against the clock's direction'.

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