bound up is an adjective meaning "closely or inseparably connected or associated with". It carries 2 recorded senses.
closely or inseparably connected or associated with
“his career is bound up with the fortunes of the enterprise”
deeply devoted to
“bound up in her teaching”
“is wrapped up in his family”
Definitions, synonyms and semantic relations for bound up come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.