incoherent (
http://definr.com/incoherent)
adj 1: without logical or meaningful connection; "a turgid
incoherent presentation" [ant:
coherent]
2: unable to think or express your thoughts in a clear or
orderly manner; "incoherent with grief"
3: unable to express yourself clearly or fluently; "felt
tongue-tied with embarrassment"; "incoherent with grief"
[syn:
tongue-tied]