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The prefix de- has several meanings.

Meaning 1: reverse (an action)

  • The company decentralized its manufacturing and built factories across the country.

Meaning 2: remove

  • The aircraft was de-iced.

Meaning 3: decrease

  • With voltage derating, electrical devices last longer.

Meaning 4: get off of

  • The passengers deplaned and then went through customs.

Meaning 5: down, away

  • She descended the stairs.

Meaning 6: completely

  • The trees were denuded of their leaves.