COOPERATE
NOUNS – PERSON
► CO-OPERATRESS a female cooperator or fellow worker → 1629
► COOPERATRIX a female cooperator or fellow worker → 1657
PHRASES
► YOU SCRATCH MY BACK, I SCRATCH YOURS let us cooperate; let us be reciprocally and mutually helpful → 1858
VERBS
► NEIGHBOUR to cooperate, to work together; to act as partners → 1872 Sc.
► NOT TO BUDGE A PEG to not cooperate at all → 1858 Amer. dial.
► NOT TO MOVE A PEG to not cooperate at all → 1858 Amer. dial.
► PLAY BALL to cooperate → 1902 US sl.
Lexicophilia 