I read the boxed article in the newspaper.
A lion is sleeping inside the enclosure at the zoo.
I put a box around the important word to emphasize it.
The article was set off in a box on the page to make it stand out.
The enemy forces finally lifted the siege and withdrew.
The troops ended up falling into the enemy's encirclement.
囲い usually refers to a physical fence or enclosure built to keep something in or out, while 囲み is more abstract, covering visual borders (like a box around text) as well as physical ones.
place; point; part; spot; area; passage; portion · counter for places, parts, passages, etc.
covering take (karuta); kakomi-te
on-the-spot interview by surrounding reporters; scrum interview
enclosed character; circled alphanumeric
boxed article; newspaper column
enclosing class
Standard kanji spelling; high-frequency news term.
Noun form of the verb 囲む (かこむ, 'to surround'), from the kanji 囲 ('enclose') and the nominalizing suffix み.