suffix ~家 (specialist, expert)

The Sino-Japanese suffix ~家 ('-ist, expert, specialist, dedicated practitioner') attached to a noun to form a person-noun: 冒険家 ('adventurer'), 小説家 ('novelist'), 政治家 ('politician'), 芸術家 ('artist'), 専門家 ('specialist'), 評論家 ('critic'), 楽天家 ('optimist'). Productive across professional and dispositional roles.