baseless

groundless; based on no good reasons or facts ไม่มีมูลความจริง

Mr Wattana was quick to deny the report, calling it baseless.

Mr Kasit said he only knew of three allegations made against him since he took up the ministerial position, and insisted all three were baseless.

Ping Ping, who has been linked romantically with Krit, insists the rumours are baseless.