In his article Some relations of linguistics and ethnology, Lg. 17.291 (1941), Alfred L. Kroeber wrote: On the whole, it is evident that of the two disciplines ethnology is the one which is dependent on linguistics. But the relations are complex, and now and then it is the linguist who can profit by what the anthropologist can tender him.' One kind of material that the anthropologist can offer the linguist is lexical usage in ordinary conversation. I have gone through my field notes and have marked each instance where I recorded a term of approval or disapproval used by a Navaho speaking to one or more other Navahos. I shall report here primarily upon the circumstances surrounding words used most frequently; but I shall also note some less common phrases that seem to illuminate Navaho conceptions of values. Where possible, I have checked my recordings against those published by Sapir, Haile, and Hoijer. In some cases I reproduce here material published by these and other linguists, where this adds to or clarifies the data in my own notes.