Choose the word that is most opposite in meaning to “approach”.

The correct option is Retreat.

Understanding the Word "Approach":
The word approach means to move closer to someone or something in terms of distance, time, or relationship.

Analyzing the Options:
• Retreat: Means to move back, withdraw, or move away from a location or situation. Moving away is the direct opposite of coming closer. Therefore, this is the word most opposite in meaning to "approach".
• Advance: Means to move forward towards a point, which is similar in meaning (synonym) to "approach".
• Welcome: Means to greet someone hospitably upon arrival.
• Arrival: Means the act of reaching a destination.

Therefore, the word most opposite in meaning to "approach" is Retreat.