involvement

mastery
/ɪnˈvɑlv.mənt/noun

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Which word is closest in meaning to 'involvement' in this sentence?

His colorful life span might be regarded as the story of an adventurer rather than that of an artist; despite his lengthy involvements in many of the arts--painting, fiction, theater, and film--one often feels from his autobiography that it was the adventures that counted most for him.