HSK 7–9 · verb
积
to accumulate; to store up
路上积了不少水，走路要小心。
Lùshang jīle bù shǎo shuǐ， zǒulù yào xiǎoxīn。
A lot of water has collected on the road, so be careful walking.
他积极参加各种活动。
Tā jījí cānjiā gèzhǒng huódòng.
He takes an active part in all kinds of activities.
学习要慢慢积累。
Xuéxí yào mànmàn jīlěi.
Learning requires gradual accumulation.
学汉语要积累词汇。
Xué Hànyǔ yào jīlěi cíhuì.
Learning Chinese requires building up vocabulary.