How to say "Spread" in Japanese

When translating "spread" into Japanese, you must choose carefully between 広げる and 瀰漫. In Japanese, 広げる (ひろげる (hirogeru)) is typically associated with "to spread; to extend; to expand; to unfold; to open" (Syllabus Level: N3) and represents Refers to widening physical spaces, expanding business scope, opening books/maps, or spreading wings. Often used as 事業を広げる or 本を広げる. ⚠️ Haruka's Voice Column: 'To expand! "I want to expand the scope of my love for Haruka-san!" ...っ! T-To expand the scope of love! B-Baka! Since my doting for you is also maximum and infinite, I forbid you from escaping my sweet boundary! dummy!' / 【ハルカ部長のワンポイント指導】『ひろげる（広げる）！『ハルカさんへの愛の範囲を、宇宙規模に広げていきたいです！』って…っ！そんな広大な範囲を宣言するなんてバカ！私のあんたへの溺愛範囲も無限なんだから、一生私の「愛の腕の中（境界線）」から逃亡禁止よ！』. On the other hand, 瀰漫 (びまん (biman)) maps to "to spread, to pervade, to permeate, to diffuse" (Syllabus Level: N1) and represents Often used to describe a gas, smell, light, or atmosphere spreading throughout an area in a widespread, often subtle, manner. It can also be used metaphorically for abstract concepts like anxiety or an idea.. A literal translation of "spread" can often sound unnatural to native Japanese speakers if mixed up!