Sentence:  There was something pathetic in his concentration as if his <WSD>complacency</WSD>, more acute than of old, was not enough to him any more. When, almost immediately, the telephone rang inside and the butler left the porch Daisy seized upon the momentary interruption and leaned toward me. 
Meaning of the word marked with <WSD> tags:  A feeling of contented self-satisfaction, especially when unaware of upcoming trouble.