執拗[shitsuyou] persistent
拗くれる[nejikureru] to curve
拗ける[nejikeru] to curve
拗ねる[suneru] to be peevish
拗れる[kojireru] to get complicated

拗音[youon] contracted sound
拗れる[nejireru] to twist
拗じる[nejiru] to screw
拗ね者[sunemono] perverse individual
拗らせる[kojiraseru] to aggravate