groundless — English Dictionary

Adjective

1. Without any grounds to support it; baseless.

   Synonyms

   baselessunfoundedunsupported

   Examples

   [B]e the consequences what they may, they shall not move an inch, nor a hair's-breadth from the ground of their groundless spiritual independence, […]

   More examples (1)

   At that stage any fears among home fans of a possession monopoly by Laudrup's side were proving groundless, with Cardiff having their fair share of the ball and territory.

2. Bottomless; having no bottom or floor.

   Usage

   • Obsolete

Adjective

1. without a basis in reason or fact

   Synonyms

   baselessidleunfoundedunwarrantedwild

   Examples

   baseless gossip

   the allegations proved groundless

   More examples (3)

   idle fears

   unfounded suspicions

   unwarranted jealousy