Dratted is the adjective that matches drat. You put it in front of a thing — or sometimes a person — you are fed up with: that dratted alarm, this dratted computer. It does not name a real quality of the thing; it only shows the speaker’s annoyance. Like drat, it is mild, a little old-fashioned, and a little storybook in feel. Younger speakers more often say that stupid… or that damn… (which is stronger). Though actually, some families still use dratted around children, because it lets you complain without using a word they should not copy.