Sentence:  The leader Montgomery envisages will need to discipline himself , lead a carefully regulated and orderly life , allow time for quiet thought and reflection , adapt decisions and plans to changing situations , <WSD>be</WSD> ruthless , particularly with inefficiency , and be honest and morally proper . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)