Resembling, characteristic of, or suggestive of hell; infernal, unpleasant, or demonic in nature.
From 'hell' plus the adjectival suffix '-y,' a productive English pattern for creating descriptive adjectives. The '-y' suffix turns nouns into qualitative adjectives describing the essence or quality of the noun.
The suffix '-y' is one of English's most versatile—'helly,' 'cloudy,' 'grumpy,' and 'sleepy' all work the same way, letting any noun become an adjective by adding just two letters, which is why children naturally create invented words like 'giggly' and 'yucky.'
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