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Use "idiomaticity" in a sentence
"To him, perhaps, this was a small price to pay for the fluency and idiomaticity that accrue from having an extensive lexicon."
"These re-translated texts can then be compared with the originals – and this is where lots of awareness-raising can occur, at the level of vocabulary, phraseology, idiomaticity, and syntax."
"(The idiomaticity, and register-specificity of many chunks might mean, though, that, in the absence of context, learners could miss important aspects of meaning and use)."