Senses
牢 prison
prison; jail; a short form for 牢房
牢 firm
sturdy; fast; durable
牢 [animal pen]
(literary) a pen or fold for domestic animals such as cattle or sheep
牢 [sacrifice]
(archaic) sacrificial animals; meat used for ancient religious offerings
牢 surname
a Chinese surname
牢 dependable
reliable; secure; safe (of conduct or affairs)