أربع صور و كلمة واحدة

Can you recognize the common word that expresses the four pictures ??
The game does not need any information .. but they need to Trkiz..mharrat link .. Alastnteg..altvkir outside the box and logical reasoning.
Did not know the solution .. well focused on the link, which combines four images because sometimes you may need to resolve deep stage what you are not aware of the concentration has been understood by others simply.