tranquilizing

adj

1. Of a drug: having the effect of calming a person or animal, or putting them to sleep; sedating, sedative.
2. (literary)Having the effect of making someone or something tranquil; calming, soothing.

   “In a preceding paper I have spoken of an English Sunday in the country, and its tranquilizing effect upon the landscape; but where is its sacred influence more strikingly apparent than in the very heart of that great Babel, London?”

noun

1. (uncountable)gerund of tranquilize
2. (uncountable)gerund of tranquilize

verb

1. (form-of, gerund, participle, present)present participle and gerund of tranquilize