Unassuming(a.) Not assuming; not bold or forward; not arrogant or presuming; humble; modest; retiring; as, an unassuming youth; unassuming manners.
Thesaurus Entries
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