Present participle of 'agrise'; the act of causing fear or terror (archaic).
From 'agrise' with the present participle suffix '-ing'. This form appears in older English texts but has been superseded by modern synonyms like 'frightening' or 'terrifying'.
The -ing form 'agrising' reminds us that language is constantly evolving—words that were common enough to be used in their continuous forms eventually fade from use, replaced by more convenient or euphonious alternatives.
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