plain; clear; easy to understand

to understand something very clearly, as if pointing to things in one's own palm; to know something inside out

clear and easy to understand at a single glance

To look out from a height or a distance at the scenery

to understand clearly; evident; plain to see

expressed in simple terms; clear and easy to understand

to know something or someone extremely well, as if looking at things on the palm of one's hand; to know like the back of one's hand

A high platform or tower used for observation, monitoring enemy movements, or spotting fires

A high or distant position used for monitoring enemy movements, fire hazards, or other situations; can refer to the post itself or the personnel stationed there

to go on sentry duty; to keep watch

watchtower; observation tower

mountain in Changhua County, Taiwan, also known as Bagua Mountain