investigational

I i

Definitions of investigational word

noun investigational Of, or relating to investigating, or to an investigation. 1
adjective investigational (medicine) of, or relating to an unapproved drug or chemical entity being studied. 0

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A common word. It’s meaning is known to most children of preschool age. About 90% of English native speakers know the meaning and use the word.

This word is included in each student's vocabulary. Most likely there is at least one movie with this word in the title.

This diagram is provided by Google Ngram Viewer

experimental — (of a new invention or product) based on untested ideas or techniques and not yet established or finalized.

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