- incoherent - without logical or meaningful connection; "a turgid incoherent presentation"
Antonyms: coherent, consistent, logical, ordered, orderly, seamless
- incoherent - unable to think or express your thoughts in a clear or orderly manner; "incoherent with grief"
Antonym: rational (indirect, via irrational)
- incoherent, tongue-tied - unable to express yourself clearly or fluently; "felt tongue-tied with embarrassment"; "incoherent with grief"
Antonym: articulate (indirect, via inarticulate)