牢 (w)

(láo) firm; sturdy; fold (for animals); sacrifice; prison

牢固 (w)

(láogù) firm; secure

牢房 (w)

(láofáng) jail cell; prison cell

牢牢 (w)

(láoláo) firmly; safely

牢狱 (w)

(láoyù) prison

牢笼 (w)

(láolóng) cage; trap (e.g. basket, pit or snare for catching animals); fig. bonds (of wrong ideas); shackles (of past misconceptions); to trap; to shackle

牢记 (w)

(láojì) to keep in mind; to remember

牢靠 (w)

(láokào) firm and solid; robust; reliable

牢靠妥当 (w)

(láokàotuǒdàng) reliable; solid and dependable

牢骚 (w)

(láosāo) discontent; complaint; to complain