Sentence:  On the structural level, this exclusion has many modes, such as the exclusion of the Arabs from the centers of political decision-making, their <WSD>nonconscription</WSD> into the army, the non- employment of Arabs in senior positions, the existence of special offices to deal with Arabs, and the attitude that they constitute a security risk. 
Meaning of the word marked with <WSD> tags:  Failure to serve in the military.