Third-person singular present tense of embark; to board a ship or aircraft, or to begin an undertaking.
From embark (em- + bark, from French 'barque' meaning ship, from Latin 'barca'). The verb form adds the present-tense third-person singular suffix '-s'.
The verb 'embark' is beautifully metaphorical—while literally about boarding ships, we say 'she embarks on a new career' or 'they embark on a quest,' showing how maritime vocabulary infuses everyday English speech.
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