Correct Answer: To overwhelm

Solution : The second option is the correct answer.

The one-word substitute for the given group of words could be "to overwhelm" based on its meaning, which includes having a strong emotional effect, forfeiting, being overcome, smothered, or yielding to a powerful force.

The meanings of other options are as follows:

• To forfeit means to lose or give up something, usually as a penalty.
• To smother means to stifle or suppress, often used in an emotional context.
• To yield can mean to give way or surrender; it is often used in emotional or relational contexts.

Therefore, the correct answer is to overwhelm.