轻 + 了 + Noun / 轻轻 + 地 + Verb
轻 (qīng) means "light," "gentle," or "soft," describing something of low weight, force, or intensity. It is also used in idiomatic expressions. For example, 轻了口气 means "breathed a sigh of relief" (literally "lightened a breath").
走路轻一点,孩子在睡觉。
Zǒulù qīng yìdiǎn, háizi zài shuìjiào.
Walk more quietly — the child is sleeping.
这个箱子很轻,我一只手就能提起来。
Zhège xiāngzi hěn qīng, wǒ yì zhī shǒu jiù néng tí qǐlái.
This box is very light; I can lift it with one hand.
她轻轻关上门,怕吵醒了室友。
Tā qīngqīng guānshàng mén, pà chǎoxǐng le shìyǒu.
She gently closed the door, afraid of waking her roommate.