expression, godan verb (-tsu)
give off fragrance; emit a pleasant smell
Literary or formal expression for emitting a fragrance, often used for flowers, incense, or poetic descriptions.
庭のバラが芳香を放っている。
The roses in the garden are giving off a fragrance.
香る is a common intransitive verb meaning 'to smell sweet', while 芳香を放つ is a more formal, literary expression.
Compound of 芳香 (fragrance) + を + 放つ (to release, emit).