/ səbˈmɜːdʒ; NAmE -ˈmɜːrdʒ/ verb
1.
to go under the surface of water or liquid; to put sth or make sth go under the surface of water or liquid :
[ v ]
The submarine had had time to submerge before the warship could approach.
[ vn ]
The fields had been submerged by floodwater.
2.
[ vn ] to hide ideas, feelings, opinions, etc. completely :
Doubts that had been submerged in her mind suddenly resurfaced.
► sub·merged adjective :
Her submerged car was discovered in the river by police divers.
► sub·mer·sion / səbˈmɜːʃn; NAmE -ˈmɜːrʒn/ noun [ U ]
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WORD ORIGIN
early 17th cent.: from Latin submergere , from sub- under + mergere to dip.