"masticating" in the verb sense
1. masticate
grind and knead
"masticate rubber"
2. chew, masticate, manducate, jaw
chew (food to bite and grind with the teeth
"He jawed his bubble gum"
"Chew your food and don't swallow it!"
"The cows were masticating the grass"
Source: WordNet® (An amazing lexical database of English)
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