to be overly proud or self-confident
过于骄傲或自信 (guò yú jiāo ào huò zì xìn)
"He’s so full of himself after getting that promotion."
"他在获得晋升后变得如此自大。" (tā zài huò dé jìn shēng hòu biàn dé rú cǐ zì dà)
a subject that is currently popular on social media
free of charge; paid for by the establishment
To get deeply involved in something, often unintentionally.
both sides must trust each other
raining very heavily
to increase speed