IPA: /ˈklɪŋiər/
KK: /ˈklɪŋiər/
More likely to hold on tightly to someone or something, often in a way that shows excessive attachment or dependence.
After the breakup, she became clingier and wanted to spend all her time with her friends.
Comparative: clingier
Superlative: clingiest
Clingier is formed from "cling" (from Old English "clingan", meaning to adhere or stick) and the suffix "-ier" (indicating a comparative form). The word "clingier" means more inclined to cling or stick closely to someone or something.
Think of someone who is more likely to 'stick' ('cling') to you, making them 'clingier'.