expression, ichidan verb
accept a kind offer; take someone up on their offer
Often used in the pattern お言葉に甘える to humbly accept an offer or invitation, showing gratitude while acknowledging the other person's kindness.
お言葉に甘えて、もう一杯いただきます。
I'll take you up on your kind offer and have another cup.
せっかくですので、お言葉に甘えさせて
Since you're so kind, I'll accept your offer.