noun
heavy smoker; tobacco lover
Refers to a person who enjoys smoking and smokes regularly, often with a nuance of being a devoted or habitual smoker. Not a clinical term; carries a slightly literary or self-deprecating tone.
彼は筋金入りの愛煙家で、一日に二箱吸う。
He is a die-hard heavy smoker and goes through two packs a day.
愛煙家にとって、このカフェは貴重な喫煙可能
For tobacco lovers, this café is a precious place where smoking is allowed.
ヘビースモーカー is a loanword for 'heavy smoker', more casual and direct, whereas 愛煙家 is a native Japanese compound with a softer, more literary feel.
Compound of 愛 (love) + 煙 (smoke/tobacco) + 家 (person/enthusiast). The exact historical derivation is uncertain, but the word follows a common pattern for describing aficionados (e.g., 愛読家, avid reader).