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Ancient Greek λεπτός
Ancient Greek λέπω (affix)
Ancient Greek -τός (affix)
Proto-Indo-European *lewbʰ- (derived)

English lepton (mention)
English lepton (derived)
English lepto- (borrowed(en/mul))
English lepto- (borrowed)
English leptonema (borrowed)
English leptin (mention)
English leptocephalus (derived)
English leptotene (borrowed)
English Leptolithic (mention)
English leptospira (derived)
Greek λεπτός (inherited)
Greek λεπτομέρεια (compound)
Mycenaean Greek 𐀩𐀡𐀵 (cognate)
Ancient Greek λεπτόγεως (affix)
Ancient Greek λεπτίον (affix)
Latin leptus (derived)
Latin leptorhynchus (derived)
Latin leptoptilos (derived)
Latvian lepns (cognate)
Translingual Leptoptilos (derived)
Translingual leptonyx (derived)
Translingual Leptostraca (derived)
Translingual Leptoglossus (derived)
Translingual Leptoptilos argala (derived)
Dutch lepton (mention)
Russian лепта (mention)