Dictionary
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| in·val·u·a·ble [ in vállyoo əb'l ] |
adjective |
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very useful: extremely useful or valuable
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 in·val·u·a·bly adverb |
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| Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc. |
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