temperamental

IPA: tɛmprʌmˈɛntʌɫ

(not comparable) Of, related to, or caused by temperament.
Subject to changing and unpredictable emotional states; moody, capricious.
(of a machine or of software, figuratively) User-unfriendly, unstable, that is complicated or has poorly written instructions and is subsequently difficult to operate.

Examples of "temperamental" in Sentences

CZ: You have been called temperamental, eccentric and tempestuous.
There, he became known as a temperamental experimentalist, obsessive and fearless.
Yaks are known to be temperamental, which is why I gave them plenty of respect even as I clamored closer for photographs.
And yet there is a certain temperamental similarity, evident enough now, though it would not have been so a dozen years ago.
Reveka, honest and temperamental, is easily outmaneuvered, and so it is usually Reveka who joylessly plunks a silver tray on the coffee table and retreats in a sulk.
But the truth is that we’ve always had it; it’s just that it used to be called being a brat, and then it was called temperamental, and now it’s called something else.
The main temperamental difference between Blair and Brown is that Blair really is/was a neo-Gladstonian, and there’s no sense of that kind of lofty paternalism in his approach to governance.