reticency — the state of being reticent, or reserved, especially with regard to speaking freely; restraint: His natural reticence seemed to disappear under the influence of alcohol.
humbly — not proud or arrogant; modest: to be humble although successful.
plainly — clear or distinct to the eye or ear: a plain trail to the river; to stand in plain view.
quietly — making no noise or sound, especially no disturbing sound: quiet neighbors.
unobtrusively — not obtrusive; inconspicuous, unassertive, or reticent.
over-presumptuous — full of, characterized by, or showing presumption or readiness to presume in conduct or thought, as by saying or doing something without right or permission.
unpretentious — not pretentious; modest; without ostentatious display; plain: his unpretentious demeanor; an unpretentious summer resort.
virtuously — conforming to moral and ethical principles; morally excellent; upright: Lead a virtuous life.