1. (a.) Proceeding in a straight course or manner; not deviating; honest; frank.

2. (adv.) In a straightforward manner.

Attic Ciceronian Mickey Mouse Spartan aboveboard apparent artless ascetic austere bald bare barefaced bluff blunt broad brusque candid casual chaste classic clean-cut clear clear as crystal clear as day clear-cut coherent common commonplace connected consistent crisp crystal-clear crystalline cushy dead dead ahead defined definite direct directly distinct downright dry due due north dull easy easy as pie effortless elegant evident explicit express facile finished forthright frank frankhearted free free-speaking free-spoken free-tongued genuine glib graceful gracile heart-to-heart homely homespun honest honorable immediate in a beeline in line with inartificial incomplex ingenuous irreversible just lean light limpid loud and clear lucid luminous manifest matter-of-fact native natural neat nothing to it one-way open openhearted outspoken painless palpable patent pellucid perspicuous plain plain dealing plain-speaking plain-spoken polished prosaic prosing prosy pure refined restrained right round rustic severe simple simple as ABC simple-speaking sincere smooth sober soft spare stark straight straight across straight ahead straight-out straightaway straightforwards straightly straightway tasteful terse through translucent transparent transpicuous trim unadorned unaffected unambiguous unartificial unassuming unbroken unburdensome unchecked uncomplicated unconcealed unconfused unconstrained undeviating undeviatingly undisguised undissembled undissembling unequivocal unfeigning unguarded unidirectional unimaginative uninterrupted uninvolved univocal unlabored unmistakable unpoetical unpretending unpretentious unreserved unrestrained unswerving unswervingly unvarnished unveeringly upright upstanding well-defined