The quality or condition of having two sides or affecting both sides equally.
From Latin 'bi-' (two) + 'lateralis' (relating to sides). The suffix '-ity' converts the adjective into a noun expressing the state or quality of being bilateral.
This word perfectly captures how many treaties, agreements, and relationships in human history involve two parties on equal footing—think of how countries sign bilateral trade agreements specifically to emphasize mutual benefit rather than one-sided advantage.
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