causeless

1 8.2

Happening for no clear reason

adjective
/ˈkɔːzləs/

: sin causa

Freak: an unusual object, product, animal, or person on exhibition as an example of a strange deviation; a sudden and apparently causeless change or turn of events; a person of unwitting courage and bravery; a rebel; a wonder; an angel.

Examples

So don't imitate that literally, don't you be random, causeless, thoughtless, right?
I am filled with causeless joy with a pure presence of being.

Blog text (34)
If it were, causeless bloodbaths would happen all the time, especially around where I live.

Blog text (14)
Because her terror was irrational and causeless, she could not talk of it, could not confide in anyone; she would not know how to begin.

Fiction book (2002)
These brutal and causeless murders were clearly committed, as the testimony shows, to effect political ends, and as a part of the plan of the political campaign adopted by the Democrats.

Blog text (6)
Her causeless laughter filled the room, bringing joy to everyone around her.
He felt a causeless fear as he walked alone at night, unsure of what was lurking in the shadows.
The causeless tension in the meeting made everyone feel uncomfortable, even though no one knew why.

Synonyms

unexplained

vscauseless

62 4.8

No one knows the cause

points to lack of explanation rather than absolute absence of cause

unprovoked

vscauseless

23 6.5

Happening for no clear reason

is used more generally, not only for actions without provocation

motiveless

vscauseless

1 8.3

Happening or felt without any clear reason

covers lack of any cause, not only missing motive

uncaused

vscauseless

1 9.9

Having no clear cause or reason

is a general label for things existing with no identifiable reason

reasonless

vscauseless

1 8.6

Without a good reason or explanation

is the neutral form focusing on absence of any cause

sourceless

vscauseless

8.1

Having no known cause or beginning

focuses on origin while the key stresses lack of identifiable reason

Surface Forms

causeless positive

Morphology

causeless = cause (transparent) = cause + less

Built from the noun 'cause' + the productive suffix '-less', meaning 'without a cause', which is directly inferable by learners.

Etymology

Causeless is simply the word cause plus the ending -less, which means 'without' and appears in words like hopeless. So something causeless happens 'without a cause', meaning it seems to happen for no clear reason.