To shout loudly with strong emotion like anger, excitement, or fear.
From Old English 'gillan' meaning to yell or howl. It's related to words meaning 'high-pitched' and has been used since Anglo-Saxon times to describe loud shouting.
The word 'yell' is so old it goes back to when English had a sound that made verbs sound like 'gillian' that eventually became our modern 'yell'—and it's related to words about things that are high-pitched or piercing, which makes sense for screaming.
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