muka-muka（ムカムカ）
muka-muka describes a feeling of disgust, irritation, or emotional nausea, often directed toward something unpleasant, offensive, or frustrating.
moya-moya（モヤモヤ）
moya-moya describes a state of emotional or mental haziness, where feelings are unclear, unresolved, or vaguely uncomfortable.
moko（モコ）
moko describes a single soft, rounded bulge or puffed-up shape.
moko-moko（モコモコ）
moko-moko describes something that appears soft, fluffy, and thickly padded.