also: バリアー · バリヤ · バリヤー
noun
barrier; protective wall; bulwark
Physical or metaphorical barrier that blocks passage, protects, or separates.
新しいセキュリティシステムは強力なバリアを形成する。
The new security system forms a strong barrier.
言語のバリアがコミュニケーションを難しくしている。
The language barrier makes communication difficult.
noun
Something that impedes progress or action; often used in abstract contexts like social or psychological obstacles.
彼の昇進にはいくつかのバリアがあった。
There were several obstacles to his promotion.
noun, interjection
imaginary shield; invincibility charm
Children's language: shouted to claim temporary invincibility in games, or after touching something dirty to 'protect' oneself. Also used humorously by adults.
鬼ごっこで「バリア！」と叫んで捕まらないようにする。
In tag, they shout 'Barrier!' to avoid being caught.
汚いものに触った後、子供が「バリア！」と言った。
After touching something dirty, the child said 'Barrier!'
More formal and often used for physical or abstract walls/barriers in serious contexts, while バリア is a common loanword with a broader, sometimes playful range.
Refers to an obstacle or impediment, often used in disability contexts or as a general hindrance; バリア is more about a protective or separating barrier.
Loanword from English 'barrier', adopted into Japanese with katakana spelling. The children's game usage is a semantic extension unique to Japanese.