"Words are not pebbles in alien juxtaposition; they have only a communal existence; and not only does the meaning of each interpenetrate the other, but all in their aggregate take their purport from the setting in which they are used of which the relation between the speaker and the hearer is the most important part." Judge Learned Hand, NLRB v. Federbush Co., 121 F.2d 954, 957 (2d Cir. 1941).