The Hebrew word beged (בֶּגֶד) has a remarkable dual meaning: it means both a garment or clothing AND treachery or faithlessness. Both meanings derive from the same root, with the verbal form meaning to act treacherously or deceitfully. This dual meaning creates rich theological wordplay throughout the Old Testament, where clothing and moral character are intertwined.
Beged connects the outer garment to inner moral reality. The "garments of salvation" and "robe of righteousness" in Isaiah 61:10 speak of God clothing His redeemed people in moral perfection. Zechariah 3 shows the high priest Joshua in filthy garments (representing sin/treachery) being reclothed in clean garments as a picture of justification. The act of tearing garments (qara beged) signified grief and repentance. The soldiers who cast lots for Jesus's garments at the crucifixion (Psalm 22:18) fulfilled prophecy — the ultimate treachery and ultimate sacrifice intertwined in one moment.