“Defiantly” most nearly means: victorious obstinate certain malleable

The word "Defiantly" most nearly means "obstinate". Here's why:

1. "Defiantly" is an adverb derived from the adjective "defiant", which describes someone who refuses to obey something or someone, often in a challenging and rebellious way.

2. Looking at the options, "victorious" means having won a victory or being successful, which doesn't align with the meaning of "defiantly".

3. "Certain" means being sure about something, and "malleable" refers to being easily influenced or shaped. Neither of these options match the meaning of "defiantly".

4. "Obstinate", however, means stubbornly refusing to change one's opinion or chosen course of action, despite attempts to persuade one to do so. This is very similar to the meaning of "defiant", making "obstinate" the best choice.