a. 渐渐渗入的

[ adj ]
gradually intrusive without right or permission
<adj.all>
we moved back from the encroaching tideinvasive tourists
trespassing hunters

Encroach \En*croach"\, v. i. [imp. & p. p. {Encroached}; p. pr.
& vb. n. {Encroaching}.] [OF. encrochier to perch, prop., to
hook, fasten a hook (perh. confused with acrochier, F.
accrocher, to hook, get hold of, E. accroach); pref. en- (L.
in) + F. croc hook. See {Crook}, and cf. {Accroach}.]
To enter by gradual steps or by stealth into the possessions
or rights of another; to trespass; to intrude; to trench; --
commonly with on or upon; as, to encroach on a neighbor; to
encroach on the highway.

No sense, faculty, or member must encroach upon or
interfere with the duty and office of another. --South.

Superstition, . . . a creeping and encroaching evil.
--Hooker.

Exclude the encroaching cattle from thy ground.
--Dryden.

Syn: To intrude; trench; infringe; invade; trespass.