IPA: /bɪˈliːɡərmənt/
KK: /bɪˈliɡərmənt/
A situation where a place is surrounded and blocked, often in a military context, making it difficult for people to enter or leave.
The city was under a beleaguerment, with troops surrounding it on all sides.
Beleaguerment is formed from "be-" (meaning about or around) and "leaguer" (from Middle Dutch *leger*, meaning camp or siege) and the suffix "-ment" (indicating the action or result of). The word describes the act of surrounding or besieging a place, particularly in a military context.
Think of being 'surrounded' ('be-') by a 'camp' ('leaguer') — that's why beleaguerment means being besieged or surrounded.
No commonly confused words.