straightforward

Synonyms: aboveboard barefaced candid direct forthright frank genuine guileless honorable just laid on the line level like it is mellow open outspoken plain plain-dealing pretenseless right-on sincere square-shooting straight straight-arrow talking turkey truthful unconcealed undisguised undissembled undissembling unequivocal unvarnished up front upright upstanding veracious

Antonyms: deceitful devious dishonest

Synonyms: apparent clear clear-cut direct distinct elementary evident manifest palpable patent plain routine straight through unambiguous uncomplicated undemanding unequivocal uninterrupted

Antonyms: complicated difficult hard indirect involved