You can change the font to another thicker font and then bold it, that is, you can complete the further bold font. The specific steps are as follows:
1. Step 1: Open word20 16 software and enter a paragraph, as shown in the figure below.
Step 2: Select these words and click "B" (bold symbol) in the lower left corner of the pop-up box to bold the selected words, as shown in the following figure.
Step 3: After completion, we will find that the font is getting thicker, and then copy the paragraph and put it below, as shown in the figure below.
4. Step 4: Select the copied text and change the font to "bold" in the upper left corner of the pop-up box, as shown in the following figure.
5. Step 5: After completion, you will find that the black font below is thicker than the black font above, thus completing the further thickening on the basis of font thickening, as shown in the figure below.