List of unassuming synonyms and unassuming related words.
Bohemian, affable, arcadian, authentic, bona fide, bucolic, candid, card-carrying, casual, cordial, degage, dinkum, direct, easy, easygoing, familiar, folksy, following the letter, free and easy, genuine, good, gracious, guileless, haymish, homely, homespun, homey, honest, honest-to-God, humble, inartificial, informal, irregular, lawful, legitimate, lifelike, literal, loose, lowly, meek, modest, native, natural, naturalistic, naturelike, offhand, offhanded, original, pastoral, plain, pure, real, realistic, relaxed, rightful, rural, simon-pure, simple, sincere, sociable, sterling, straightforward, sure-enough, true to life, true to nature, true to reality, unadorned, unadulterated, unaffected, unambitious, unartificial, unaspiring, unassumed, unbeguileful, unbeguiling, unboastful, uncalculating, unceremonious, uncolored, unconcocted, unconstrained, unconventional, uncopied, uncounterfeited, undeceitful, undeceiving, undeceptive, undesigning, undisguised, undisguising, undissembling, undissimulated, undissimulating, undistorted, unembellished, unexaggerated, unfabricated, unfanciful, unfeigned, unfeigning, unfictitious, unflattering, unimagined, unimitated, unimposing, uninvented, unobtrusive, unofficial, unostentatious, unpresuming, unpresumptuous, unpretended, unpretending, unpretentious, unqualified, unromantic, unsimulated, unspecious, unspoiled, unstudied, unsynthetic, untrimmed, unvarnished, verbal, verbatim, veridical, verisimilar, word-for-word