Answer :

It is an absolutely right expression. Please correct the spelling, it's threadbare which means hackneyed or cliched. Here, in this context, it means 'ineffectively stale' discussion, i.e. the discussion has so been held so often that it is not effective.

The same expression can be used for a place when it has a shabby appearance. e.g. When I entered the threadbare makeup studio, I changed my mind.

Similarly, when a cloth becomes old and tattered, it can be expressed with the same word. The old man walked on the threadbare carpet to cross the lobby. 


First of all the correct spellings are THREADBARE and Following are some of the meanings of threadbare:

- If we use this word in terms of the clothes then the meaning is; something which is shabby, poor or worn out. 
- If we use this word in terms of the argument or the discussion as stated above then the meaning of this word is hackneyed, trite, ineffective, or something which lacks the significance.

When we keep the above-mentioned examples in mind then this is absolutely correct to say that "we had a threadbare discussion"

Meaning we had a discussion which was not very good or was not very significant.

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