IPA: /ɪmˈbɑrk.mənt/
KK: /ɪmˈbɑrk.mənt/
The act of boarding a ship, aircraft, or other vehicle for a journey.
The embarkment of the passengers was scheduled for noon.
Embarkment is formed from "em-" (meaning to cause to) and "barque" (from Old French *barque*, meaning a small boat). The word refers to the act of causing to board a boat or ship, particularly for travel or transport.
Think of 'causing to board' a 'small boat' — that's what embarkment means.