Synonyms of the word

relaxed

• adj. Having an easy-going mood or temperament.
• adj. Eased or loosened.
• adj. Free from tension or anxiety, at ease.
• v. simple past tense and past participle of relax.

easy

• adj. (now rare except in certain expressions) Comfortable; at ease.
• adj. Requiring little skill or effort.
• adj. Causing ease; giving comfort, or freedom from care or labour.
• adj. Free from constraint, harshness, or formality; unconstrained; smooth.
• adj. (informal, pejorative, of a person) Consenting readily to sex.
• adj. Not making resistance or showing unwillingness; tractable; yielding; compliant.
• adj. (finance, dated) Not straitened as to money matters; opposed to tight.
• adv. In a relaxed or casual manner.
• adv. In a manner without strictness or harshness.
• adv. Used an intensifier for large magnitudes.
• adv. Not difficult, not hard.
• n. Something that is easy.
• v. (rowing) Synonym of easy-oar.

laid-back

• adj. relaxed and easy-going; an absence of stress or worry.

lax

• n. (now chiefly Britain dialectal, Scotland) A salmon.
• adj. lenient and allowing for deviation; not strict.
• adj. loose; not tight or taut.
• adj. lacking care; neglectful, negligent.
• adj. (archaic) Having a looseness of the bowels; diarrheal.
• adj. (mathematics) Describing an associative monoidal functor.
• n. (slang) Lacrosse.

mellow

• adj. Soft or tender by reason of ripeness; having a tender pulp.
• adj. Easily worked or penetrated; not hard or rigid.
• adj. Not coarse, rough, or harsh; subdued, soft, rich, delicate; said of sound, color, flavor, style, etc.
• adj. Well matured; softened by years; genial; jovial.
• adj. Relaxed; calm; easygoing; laid-back.
• adj. Warmed by liquor, slightly intoxicated, stoned, or high.
• n. A relaxed mood.
• v. (transitive) To make mellow; to relax or soften.
• v. (intransitive) To become mellow.

unagitated

• adj. Not agitated (physically or emotionally).

unstrained

• adj. Not strained or tense.
• adj. (not comparable) Not having been forced through a strainer.