UNSETTLING
Adjective
unsettling (comparative more unsettling, superlative most unsettling)
That makes one troubled or uneasy; disquieting or distressing.
Verb
unsettling
present participle of unsettle
Noun
unsettling (plural unsettlings)
The weakening of some previously established system or norm.
Source: Wiktionary
UNSETTLE
Un*set"tle, v. t. Etym: [1st pref. un- + settle.]
Definition: To move or loosen from a settled position or state; to unfix;
to displace; to disorder; to confuse.
Un*set"tle, v. i.
Definition: To become unsettled or unfixed; to be disordered. Shak.
Source: Webster’s Unabridged Dictionary 1913 Edition