Definition of 言うだけ無駄 (いうだけむだ)
いむだ
                        言うだけ無駄
いうだけむだ
iudakemuda
expression
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would be a waste of words, would be a waste of breath, there's no point in saying
Related Kanji
| 言 | say, word | 
| 無 | nothingness, none, ain't, nothing, nil, not | 
| 駄 | burdensome, pack horse, horse load, send by horse, trivial, worthless |