marginal

mastery
UK /ˈmɑː.d͡ʒɪ.nəl/ US /ˈmɑɹ.d͡ʒɪ.nəl/adjnoun

card 1 of 10 · synonym

Which word is closest in meaning to "marginal" in this sentence?

The marginal area at the edge of the forest is home to many rare species.