木板 (mùbǎn) is a noun meaning "wooden board" or "plank." It refers to a flat piece of wood and can appear in various contexts, from construction to furniture. For example, 从木板的缝隙里看 means "to look through the cracks in the boards."
地板是用木板铺的,走上去会响。
Dìbǎn shì yòng mùbǎn pū de, zǒu shàngqù huì xiǎng.
The floor is made of wooden planks, and it creaks when you walk on it.
他找了几块木板把窗户钉上了。
Tā zhǎo le jǐ kuài mùbǎn bǎ chuānghu dīng shàng le.
He found some wooden planks and nailed the window shut.
桌子是用一块厚木板做的。
Zhuōzi shì yòng yī kuài hòu mùbǎn zuò de.
The table is made from a thick wooden plank.