/ ˈsʌkl; NAmE / verb
1.
[ vn ] ( of a woman or female animal ) to feed a baby or young animal with milk from the breast or udder :
a cow suckling her calves
( old-fashioned )
a mother suckling a baby
2.
[ v ] ( of a baby or young animal ) to drink milk from its mother's breast or udder
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WORD ORIGIN
late Middle English : probably a back-formation from suckling .