Brittle

occurs in: Keywords for Radicals: The Contested Vocabulary of Late-Capitalist Struggle, p. 8

Brittle is a synonym for fragile. It is often used to describe something—a material object such as a vase or a tooth, or a concept such as friendship or language—(being on the verge of) breaking, and doing so without prior stress or stretching. In my mind it therefore has a mostly negative connotation.

Interestingly, the authors of Keywords for Radicals use the word in a positive way. Language is especially brittle in “periods of change” (cf. Introduction to Keywords: A Vocabulary of Culture and Society, Raymond Williams), and this is an opportunity to reflect on understandings and contradictions of words, and to mold language into new and possibly better forms.

For context, this is the full quote by Williams from the introduction to Keywords:

When a particular history is completed, we can all be clear and relaxed about it. But literature, aesthetic, representative, empirical, unconscious, liberal: these and many other words which seem to me to raise problems will, in the right circles, seem mere transparencies, their correct use a matter only of education. Or class, democracy, equality, evolution, materialism: these we know we must argue about, but we can assign particular uses to sects, and call all sects but our own sectarian. Language depends, it can be said, on this kind of confidence, but in any major language, and especially in periods of change, a necessary confidence and concern for clarity can quickly become brittle, if the questions involved are not faced.