What's the difference between swithe and very?

Swithe

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Definition:

• (adv.) Instantly; quickly; speedily; rapidly.

Example Sentences:

Very

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Definition:

• (v. t.) True; real; actual; veritable.
• (adv.) In a high degree; to no small extent; exceedingly; excessively; extremely; as, a very great mountain; a very bright sum; a very cold day; the river flows very rapidly; he was very much hurt.

Example Sentences: