Attested since Jin dynasty. Compare earlier form 楈枒 (OC *sŋa/sŋaʔ ŋraː/ŋraːs), 胥邪 (OC *sŋa/sŋaʔ ljaː/laː), 胥餘 (OC *sŋa/sŋaʔ la) (attested since Han dynasty); also compare Vietnamese dừa.
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