Meaning
'One han cyaa clap' — one hand cannot clap. Some things simply cannot be done alone: cooperation is needed, and no achievement comes from a single pair of hands with no help. In its other, equally common sense, it holds that a quarrel or a wrong takes two — no dispute goes on with only one side involved, so both parties share in a falling-out. Whether about teamwork or about blame, the proverb turns the plain fact that clapping needs two hands into everyday wisdom.
Examples
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Wi need fi work together pon dis; one han cyaa clap.
We need to work together on this; it can't be done alone.
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Nuh blame only she fi di fight — one han cyaa clap.
Don't blame only her for the fight — it takes two to quarrel.
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Di community strong wen wi join up; one han cyaa clap.
The community is strong when we join together; one hand can't clap.
Origin
A plain image: it takes two hands meeting to make a clap — one alone makes no sound — a figure for the need of cooperation, and for shared responsibility in a quarrel.
How it’s used
Used both to urge cooperation and to point out that a dispute involves both sides.