An arbitrator (ثالث) is an independent person or body appointed to settle a dispute. A 'referee' (منصف) serves a similar function of acting as a judge to settle matters.

Aptitude (رجحان) is a natural ability or skill to do something. It implies a natural 'tendency' (میلان) or inclination to be good at that activity.

As a verb, to appropriate (قبضہ کرنا) means to take something for one's own use, typically without permission. 'Confiscate' (ضبط کرنا) means to officially take possession of something, and is the closest synonym.

Apprehension (خدشہ) is a 'feeling of anxiety' (پریشانی کا احساس) or fear that something bad or unpleasant will happen.

To apprehend (گرفتار کرنا) has two main meanings: to understand something, or to 'catch' (پکڑنا) and arrest someone for a crime. Given the options, 'Catch' is the correct synonym.

To applaud (تعریف کرنا) means to show approval or praise. The physical action of doing this is to 'clap' (تالی بجانا) one's hands.

Appetite (بھوک) is a natural desire to satisfy a bodily need, especially for food. It is a strong desire or 'craving' (شدید خواہش). 'Contentment' (اطمینان) would be the state after the appetite is satisfied.

To appease (راضی کرنا) someone is to pacify or placate them, often by giving in to their demands. This action serves to 'mitigate' (کم کرنا) or lessen their anger. 'Aggravate' (بگاڑ دینا) is the antonym.

An apostle (رسول) is a 'missionary' (مبلغ) or vigorous and pioneering advocate of a particular cause, policy, or idea.

An apology (معافی) is a regretful acknowledgment of an offense or failure. It functions as a 'request' (درخواست) for forgiveness or pardon.