The word 废弃 is formed by combining two characters, each contributing a key aspect of the overall meaning. The first character, 废 (fèi), fundamentally means "to become useless, discontinued, or wasted", often implying a state of ruin or obsolescence. The second character, 弃 (qì), means "to discard, abandon, or throw away", representing the active act of rejection. When placed together, the compound word 废弃 merges these concepts, where the state of being useless (废) logically leads to or is confirmed by the action of abandonment (弃), creating the complete idea of "to discard as useless" or "to decommission and abandon". It is a logical and semantic fusion where the second character often acts upon or completes the state described by the first.