防御

fángyù

to defend against

出入

chū rù

to enter and leave

围

wéi

to enclose

通道

tōngdào

passage; passageway

坚固

jiāngù

hard; durable; sturdy

高大

gāodà

tall and large

联系

liánxì

to contact

城楼

chénglóu

city gate tower

城门

chéngmén

city gate

顺时针

shùnshízhēn

clockwise