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Related to engma: enigma
eng·ma(ĕng′mə) or ang·ma (ăng′-) or ag·ma (ăg′-)
1. The voiced velar nasal consonant having the sound (ng), as represented by the ng of sing and the n of sink.
2. The symbol (ŋ) used to represent this sound in some phonetic transcription systems and various other writing systems based on the Roman alphabet.
[From Greek agma, the sound engma (perhaps influenced by eng).]