More N2 vocabulary

• 塵芥ごみtrash, rubbish
• へそnavel, belly-button
• 実用じつようpractical use, utility
• 悔やむくやむto mourn
• 混ざるまざるto be mixed, to be blended with, to associate with, to mingle with, to join
• 四捨五入ししゃごにゅうrounding up (fractions)