When you quit your current generation to join an older one, you'll need to use all kinds of flattery. Older people love being flattered; so be nice and give them some compliments.
This is a jukugo word, which usually means on'yomi readings from the kanji. Just watch out, as the 世 gets shortened from せい to せ! You can memorize this by remembering to be short and sweet with your flattery, don't make it too long and overcomplicated!
to shower with flattering words
to use flattery
Koichi is not good at giving insincere compliments.
I don't like being told that my Japanese is good just to flatter me.
Hmm, there's no way to sugarcoat it: this just isn't well done.