crevasse
(n.) a deep open crack, esp in glacier
Eg: he rescued his climbing parter from a crevasses
creek
(n.) 小溪
timber
(n.) 木材
carnation
(n.) 康乃馨
acorn
(n.) an oak nut
viscous
(adj. ) sticky
eg: a viscous lava
meander
(v.) zigzag; twist; turn
Eg: a river that meander gently through the meadow