be capricious

See: vacillate
References in periodicals archive ?
But in the absence of a compelling, coherent national interest (and it is unlikely the Clinton administration will be able to devise one), the support for any military action will be capricious. The Haitian military, in fact, seems to be banking on such a scenario.
In other words, some patterned arbitrariness is too rational to be capricious, and must be proscribed by any reasonable test of what is legally peremptory.