Synonyms of dead-level

1 Syllable
meant, plain, frank, true, dear, real
2 Syllables
earnest, saintly, up-front, artless, open, serious, forthright, devout, true-blue, square, candid, faithful, righteous, heartfelt, actual
3 Syllables
guileless, regular, unfeigned, trustworthy, natural, outspoken, sincere, sincerest, genuine
4 Syllables
undesigning, pretensionless, undissembled, unpretentious, unaffected, aboveboard, no-nonsense, wholehearted