"introverts" in the noun sense
1. introvert
psychology) a person who tends to shrink from social contacts and to become preoccupied with their own thoughts
"introverts" in the verb sense
1. invaginate, introvert
fold inwards
"some organs can invaginate"
2. introvert
turn inside
"He introverted his feelings"
Source: WordNet® (An amazing lexical database of English)
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