Subject + 放开 + Object
The verb 放开 (fàngkāi) means "to let go of" or "to release." The complement 开 indicates separation or moving apart. For example, 放开妻子的手 means "let go of his wife's hand."
放开我的手,我自己能走!
Fàngkāi wǒ de shǒu, wǒ zìjǐ néng zǒu!
Let go of my hand — I can walk on my own!
他终于放开了心中的顾虑,决定去试一试。
Tā zhōngyú fàngkāi le xīnzhōng de gùlǜ, juédìng qù shì yí shì.
He finally let go of his worries and decided to give it a try.
妈妈放开孩子的手,让他自己去玩。
Māma fàngkāi háizi de shǒu, ràng tā zìjǐ qù wán.
Mom let go of the child's hand and let him go play on his own.