The surface of the lake was calm but unreflecting, like the matte finish on a photograph.
2.
impulsive or unconsidered
She was preoccupied and unreflecting.
an unreflecting mental attitude
unreflecting in American English
(ˌunrɪˈflektɪŋ)
adjective
not reflecting; unthinking
an unreflecting, self-satisfied man
Derived forms
unreflectingly
adverb
Word origin
[1655–65; un-1 + reflect + -ing2]This word is first recorded in the period 1655–65. Other words that entered Englishat around the same time include: intensity, mechanism, neutralize, outline, patrolun- is a prefix meaning “not,” freely used as an English formative, giving negative oropposite force in adjectives and their derivative adverbs and nouns (unfair; unfairly; unfairness; unfelt; unseen; unfitting; unformed; unheard-of; un-get-at-able), and less freely used in certain other nouns (unrest; unemployment); -ing is a suffix forming the present participle of verbs (walking; thinking), such participles being often used as participial adjectives (warring factions)