Meaning of jiān:
尖
pointed; tapering; sharp; (of a sound) shrill; piercing; (of one's hearing, sight etc) sharp; acute; keen
Shānfēng de dǐngduān fēicháng jiān.
山峰的顶端非常尖。
The peak of the mountain is very pointed.
Tā de shēngyīn tài jiān, ràng wǒ gǎndào bú shūfú.
她的声音太尖，让我感到不舒服。
Her voice is too shrill, which makes me uncomfortable.
Tā de ěrduo hěn jiān, néng tīngdào hěn yuǎn de shēngyīn.
他的耳朵很尖，能听到很远的声音。
His ears are very keen, he can hear sounds from afar.
to make (one's voice) shrill
Tā bǎ shēngyīn tígāo de hěn jiān.
她把声音提高得很尖。
She made her voice very shrill.
sharp point; tip; the best of sth; the cream of the crop
Tā de shūzhuō shàng yǒu yī bǎ jiān de jiǎndāo.
他的书桌上有一把尖的剪刀。
There is a pair of sharp scissors on his desk.
Tā shì wǒmen bān de jiān zǐ shēng.
他是我们班的尖子生。
He is the top student in our class.
