has been thickening
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present perfect progressiveof thicken (3rd person singular).present perfect progressive
Used to describe an action that began in the past, has continued continuously, and is still in progress.
thickenverb (used with or without object)to make or become thick or thicker.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
It is the knowledge of this circumstance that has shed a ray of hope and consolation athwart the gloom which has been thickening year after year around the colony.