A reason or justification for actions that lacks logical or reasonable basis.

A hidden or subconscious reason for behavior that is not based in reason.

छिपा हुआ या अवचेतन कारण

English Usage: She acted on an irrational motive that she couldn't fully understand herself.

Hindi Usage: उसने एक तर्कहीन कारण पर कार्य किया जिसे वह स्वयं पूरी तरह से समझ नहीं सकी।