どうでもいいような (translations)→ marginal unimportant uninteresting
のんびりした (translations)→ quiet sleepy slow trusting
のんびりと (translations)→ casual lazily lazy long peacefully
ゆうゆうと (translations)→ deliberately sedately
ゆっくり (translations)→ cautiously completely ease leisure length patiently slowly soft sound
ゆっくりと (translations)→ carefully distantly gradually pondrously restful slo-mo unhurriedly
ゆったりと (translations)→ comfortably heavily loosely luxuriously relax relaxed
徐々に (translations)→ adaptively all constantly incrementally near