Motiveless [adjective]

Iago's soliloquy, the motive-hunting of a motiveless malignity—how awful it is!

She had moods of motiveless irritation, and of unreasonable indulgence.

To its existence is often to be traced the motiveless crimes of the young.'

This duplicity was not motiveless, although, on a cursory view, its purpose may not be apparent.

Nor is it a caprice, that is, motiveless volition, or will as a motor.

The occurrences are, to all appearance, motiveless as the events in a feverish dream.

To me it seems basic to the getting rid of fear to know that our trials, of whatever nature, are not motiveless.

Here they swayed to and fro, hour after hour, motiveless, awaiting the progress of events.

There it was—an open hostility with more power behind it than Deklay's motiveless disapproval had carried.

I never loved but one woman, and her I outraged by a profligate's motiveless folly.