The antonyms for the word "over-taxing" are numerous and can be expressed in different ways. Some of them include "under-taxing," "light taxation," and "moderate taxation." When individuals or entities are under-taxed, it means they are subject to a lower tax rate compared to the average or standard rates. This can lead to reduced revenue for governments and create inequality in the tax system. On the other hand, light or moderate taxation refers to reasonable tax rates and equitable distribution of the tax burden. In these scenarios, taxes are seen as a means of generating revenue for critical public services, without imposing undue hardship on taxpayers.