incoherent
1. [ adjective ] without logical or meaningful connection
Examples:

"a turgid incoherent presentation"

Related terms: coherent confused fuzzy irrational illogical
2. [ adjective ] unable to think or express your thoughts in a clear or orderly manner
Examples:

"incoherent with grief"

Related terms: irrational
3. [ adjective ] unable to express yourself clearly or fluently
Synonyms: tongue-tied
Examples:

"felt tongue-tied with embarrassment" "incoherent with grief"

Related terms: inarticulate
Similar spelling:   incoherently
  incoherency
  incoherence
  incorrect
  in_charge
  incorrectly
  incorrectness