Emotionally intense or compelling; causing someone to grip or clench their hands in tension or anxiety, or the present participle of 'grip' with one's hand.
From 'handgrip' plus the suffix '-ing.' In its adjective form, it comes from 'grip' (meaning to affect emotionally), intensified by the association with physical hand-gripping as a sign of tension or emotion.
When something is truly 'handgriping,' your body literally responds—your hands unconsciously tighten, your pupils dilate, and your heart rate increases, so the word perfectly captures how our bodies betray our emotional state even when we try to stay calm.
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