From Wiktionary, the free dictionary
From পাত (pat, “leaf, page”).
-পাত • (-pat)
- the classifier for long flat and leaf-like things.
- Synonyms: (leaf-like) -খন (-khon), (long flat) -ডাল (-dal)
- ছুৰীপাত ― suripat ― the knife
- চামুচকেইপাত ― samuskeipat ― the spoons
- কেঁচিপাত ― kẽsipat ― the scissor(s)
- তিনিপাত চাবি ― tinipat sabi ― three keys
- এপাত চৰ ― epat sor ― a slap
Like other classifiers -পাত (-pat) doesn't come with its source noun পাত (pat).