Do not add a nominative, accusative or genitive ending to the quoted «غاق» to force it into a conventional case paradigm.
An ordinary noun such as صَوْتَ can, by contrast, show a case ending when used in a sentence.
Keep the fixed form of a sound-word distinct from the case marking of a declinable noun.
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Al-Aṣwāt — Sound-words, Their Two Uses and Grammatical Analysis
Do not add a nominative, accusative or genitive ending to the quoted «غاق» to force it into a conventional case paradigm.
An ordinary noun such as صَوْتَ can, by contrast, show a case ending when used in a sentence.
Keep the fixed form of a sound-word distinct from the case marking of a declinable noun.