A front vowel is a vowel that is articulated with the front part of the tongue.

Her heart is filled with goodness and beauty.

She completely cut off her relationship with her ex-husband.

He is trying to mend his relationship with his ex-wife.

This meal is a special meal for the Emperor.

Foreplay is a part of expressing love and an important element in deepening intimacy with your partner.

His old car moved, giving off a noise like flaying.

This is an action that does not follow precedent.

He was unable to keep the promise that was made in the past.

The answer became clear in my mind.