seethe /ˈsið/  verb

  • [no object]

    1 . to feel or show strong emotion (such as anger) even though you try to control it

    • He seethed at his brother’s success.

    — often + with

    • He seethed with anger/jealousy.
    • The letter seethes with resentment.
    • seething letter

    2 . to be in a state of constant activity

    • We found ourselves in the middle of a seething crowd.

    — often used as (be) seething with

    • The island is seething with tourists. [=there are very many tourists moving around on the island]
    • The field was seething with crickets.
    • His brain was seething with ideas.