INADVERTENT
accidental, inadvertent
(adjective) happening by chance or unexpectedly or unintentionally; “with an inadvertent gesture she swept the vase off the table”; “accidental poisoning”; “an accidental shooting”
Source: WordNet® 3.1
Etymology
Adjective
inadvertent (not comparable)
Not intentional; not on purpose; not conscious.
(obsolete) Inattentive.
Synonyms
• (not intentional): designless, unintended, accidental; see also unintentional
• (inattentive): absent-minded, distracted
Source: Wiktionary
In`ad*vert"ent, a. Etym: [Cf. F. inadvertant. See 2d In-, and
Advert.]
Definition: Not turning the mind to a matter; heedless; careless;
negligent; inattentive.
An inadvertent step may crush the snail That crawls at evening in the
public path. Cowper.
– In`ad*vert"ent*ly, adv.
Source: Webster’s Unabridged Dictionary 1913 Edition