惰性
duò xìng
inert (chemistry)
apathy; inertia; laziness
lazy (惰) + nature (性) = the tendency toward inertia
惰 pairs the heart radical with phonetic components to evoke a heart that drags and slumps; 性 adds the heart radical again, pointing to an inner disposition. Together they name the deep tendency of a mind or substance to resist change or effort.