unaffected (adj.)
- adamant
- adamantine
- aesthetic
- affable
- arcadian
- artistic
- artless
- ascetic
- austere
- authentic
- bald
- bare
- bucolic
- candid
- cast-iron
- casual
- chaste
- choice
- classic
- clear
- common
- commonplace
- cordial
- degage
- direct
- dour
- dry
- dull
- easy
- easygoing
- elegant
- excellent
- familiar
- finished
- firm
- flinty
- folksy
- frank
- genuine
- good
- graceful
- gracile
- gracious
- grim
- guileless
- hard
- hard-core
- homely
- homespun
- homey
- honest
- immovable
- immutable
- implacable
- inelastic
- inexorable
- inflexible
- informal
- ingenuous
- intransigent
- iron
- irreconcilable
- irregular
- lawful
- lean
- legitimate
- lifelike
- limpid
- literal
- loose
- lucid
- native
- natural
- naturalistic
- neat
- offhand
- offhanded
- open
- original
- pastoral
- pellucid
- perspicuous
- plain
- pleasing
- polished
- prosaic
- prosy
- pure
- quiet
- real
- realistic
- refined
- relaxed
- relentless
- restrained
- rightful
- rigid
- rigorous
- rock-ribbed
- round
- rural
- rustic
- severe
- simple
- sincere
- sober
- sociable
- spare
- stark
- steely
- sterling
- stern
- stiff
- straightforward
- subdued
- sure-enough
- tasteful
- terse
- trim
- unadorned
- unadulterated
- unalterable
- unanimated
- unassuming
- unbending
- unceremonious
- unchangeable
- uncolored
- uncompromising
- unconstrained
- unconventional
- understated
- undisguised
- undistorted
- unembellished
- unfeigned
- unflattering
- unimaginative
- unimagined
- unimpressed
- uninfluenced
- uninspired
- unmoved
- unobtrusive
- unofficial
- unpretending
- unpretentious
- unqualified
- unrelenting
- unromantic
- unruffled
- unschooled
- unsophisticated
- unspoiled
- unstirred
- unstruck
- unstudied
- unswayed
- untouched
- untrimmed
- untutored
- unvarnished
- unyielding
- verbal
- verbatim
- veridical
- verisimilar
- well-chosen