战略 (strategy) +
性 (-ity, the adjective-forming suffix). Heavy in business, military, and policy writing —
战略性合作伙伴 (strategic partner),
战略性新兴产业 (strategic emerging industries),
战略性失误 (strategic blunder). The
性 suffix turns many nouns into adjectives this way:
历史性 historic,
系统性 systematic,
决定性 decisive.