This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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verb-intransitive. To grow or sprout as a plant does.

verb-intransitive. Pathology To grow in size or spread abnormally.

verb-intransitive. To exist in a state of physical or mental inactivity or insensibility.

verb-intransitive. Informal To engage in relaxing or passive activities, such as watching television.

v. To grow or sprout.

v. To spread abnormally.

v. To live or spend a period of time in a dull, inactive, un-challenging way.

verb-intransitive. To grow, as plants, by nutriment imbibed by means of roots and leaves; to start into growth; to sprout; to germinate.

verb-intransitive. Fig.: To lead a life too low for an animate creature; to do nothing but eat and grow.

verb-intransitive. To grow exuberantly; to produce fleshy or warty outgrowths.

In pathology, to grow in the form of an excrescence.

Same as sprout, 5.

To grow in the manner of plants; fulfil vegetable functions.

Hence To live an idle, unthinking, useless life; have a mere inactive physical existence; live on without material or intellectual achievement.

To cause to vegetate or grow.

v. produce vegetation

v. engage in passive relaxation

v. establish vegetation on

v. grow like a plant

v. propagate asexually

v. lead a passive existence without using one's body or mind

v. grow or spread abnormally

"He said he did not intend to "vegetate" after his retirement and had been approached to do consulting work in the fields of water affairs, telecommunications, mining, the liquid fuels industry and the public service."

vegetated    vegetates    vegetating   

grow    unwind    slow down    relax    loosen up   

sprout    germinate    grow   

immured    hill-country