干

verb: to concern, to be implicated in, to interfere
干, 相關

干 has many senses (mostly obsolete/literary) sharing the gang1 reading, including 'to concern/interfere', 'shield', 'to request', 'bank/edge'; 'to concern/interfere' was picked as it matches the related compounds (干涉, 干預, 干證) also in this list, but the exact primary standalone sense is uncertain.