加入: becoming a member of a group / 加入: subscribing, or making affiliation with

介入: intervention

歳入: : annual income or revenue

混入: to mix one thing into another, typically in an undesirable way; to mingle, to become mixed, to get mixed, typically in an undesirable way

混入: the act of mixing; the state of being mixed; a mixing or mingling of two or more things, typically in an undesirable way

出入: income and expenses / 出入: free associations

代入: substitution

納入: to make a delivery, to supply

突入: the action of rushing in

投入: investment / 豆乳: soy milk