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audio example by a female speaker
the above transcription of invalid is a detailed (narrow) transcription according to the rules of the International Phonetic Association; you can find a description of each symbol by clicking the phoneme buttons in the secction below.
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An example use of invalid in a speech by a native speaker of american english:
“… is therefore an invalid argument as …”
Invalid means not valid or not in force.
the word invalid occurs in english on average 2.1 times per one million words; this frequency warrants it to be in the study list for C2 level of language mastery according to CEFR, the Common European Framework of Reference.
it is hard to perfectly classify words into specific topics since each word can have many context of its use, but our machine-learning models believe that invalid can be often used in the following areas:
1) communication, information, and media;
2) people, society, and culture;