罕 is a bound morpheme (b.f.) meaning 'rare, seldom'. It cannot stand alone as an independent word — it must combine with another character to form disyllabic compounds. Common compounds include 罕见 ('rare', adj.), 罕有 ('uncommon', adj.), and 罕闻 ('rarely heard'). It typically appears as the first element, modifying the second character with a sense of rarity or infrequency.