straightforward Antonyms

thorny shady shameful sidelong sigmoid sinuate sinuation sinuose sinusoid semicircular scheming reexamination rejective riddling rippled rivose rogue romantic roundabout sinusoidal skulking swirled syncretic tacit tangly technical telestic thespian thievish supermundane subterrestrial slinking slippery sly snide sophistical spirally spurious sticky recondite puzzling nebulous oblique obscure operatic orbital orphic overdelicate overscrupulous mythological