INNOCUOUS
innocent, innocuous
(adjective) lacking intent or capacity to injure; “an innocent prank”
innocuous
(adjective) not injurious to physical or mental health
innocuous, unobjectionable
(adjective) not causing disapproval; “it was an innocuous remark”; “confined himself to innocuous generalities”; “unobjectionable behavior”
Source: WordNet® 3.1
Etymology
Adjective
innocuous (comparative more innocuous, superlative most innocuous)
Harmless; producing no ill effect.
Inoffensive; unprovocative; not exceptional.
Synonyms
• (harmless, without ill effect): innoxious, nonpoisonous, nontoxic, undamaging, unharmful, harmless
• (inoffensive): uncontroversial
Antonyms
• nocuous
• noxious
• harmful
• poisonous
• toxic
Source: Wiktionary
In*noc"u*ous, a. Etym: [L. innocuus; in- not + nocuus hurtful, fr.
nocere to hurt. See Innocent.]
Definition: Harmless; producing no ill effect; innocent.
A patient, innocuous, innocent man. Burton.
– In*noc"u*ous*ly, adv.
– In*noc"u*ous*ness, n.
Where the salt sea innocuously breaks. Wordsworth.
Source: Webster’s Unabridged Dictionary 1913 Edition