a. 令人感到轻松的

[ adj ]
affording physical or mental rest
<adj.all>
she spent a restful night at home

Relax \Re*lax"\ (r?-l?ks"), v. t. [imp. & p. p. {Relaxed}
(-l?kst"); p. pr. & vb. n. {Relaxing}.] [L. relaxare; pref.
re- re- + laxare to loose, to slacken, from laxus loose. See
{Lax}, and cf. {Relay}, n., {Release}.]
1. To make lax or loose; to make less close, firm, rigid,
tense, or the like; to slacken; to loosen; to open; as, to
relax a rope or cord; to relax the muscles or sinews.

Horror . . . all his joints relaxed. --Milton.

Nor served it to relax their serried files.
--Milton.

2. To make less severe or rigorous; to abate the stringency
of; to remit in respect to strenuousness, earnestness, or
effort; as, to relax discipline; to relax one's attention
or endeavors.

The statute of mortmain was at several times relaxed
by the legislature. --Swift.

3. Hence, to relieve from attention or effort; to ease; to
recreate; to divert; as, amusement relaxes the mind.

4. To relieve from constipation; to loosen; to open; as, an
aperient relaxes the bowels.

Syn: To slacken; loosen; loose; remit; abate; mitigate; ease;
unbend; divert.