ارجح المِيزَانَ

He made the balance to incline, the scale in which was the thing weighed being heavier than the other. (Msb, TA.)

And ارجحهُ, (Msb.) or ارجح لَهُ, (S, A, * K,) He gave him preponderating weight; (S, A, * Msb, K;) as also له ↓ رجّح, (S, A, * K,) verbal noun تَرْجِيحٌ. (S.) One says, إِذَا وَزَنْتَ فَأَرْجِحْ [When thou weighest, give preponderating weight]. (A.)