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perilously + adjective
perilously 常用来修饰形容词，表示“危险地、令人担忧地”，强调程度超过安全范围。
The mountain path is perilously narrow.
这条山路窄得危险。
充满危险地；危机四伏地
先理解核心含义，再看它在真实句子里的用法。
充满危险地；危机四伏地
in a dangerous manner
The mountain path is perilously narrow.
这条山路窄得危险。
危险地。
In a perilous manner.
The hikers walked perilously close to the edge of the cliff.
徒步者走得离悬崖边缘很近，十分危险。
The old bridge swayed perilously in the strong wind.
那座旧桥在强风中危险地摇晃着。
The company's finances are perilously low.
公司的财务状况岌岌可危。
perilously 常用来修饰形容词，表示“危险地、令人担忧地”，强调程度超过安全范围。
The mountain path is perilously narrow.
这条山路窄得危险。
perilously 修饰动词时，表示动作以危险的方式进行；也可放在动词后。
She leaned perilously over the railing to see the view.
她危险地探出栏杆去看风景。
Not this
He drove perilous fast on the icy road.
Use this
He drove perilously fast on the icy road.
perilous 是形容词，不能修饰副词 fast；这里需要用副词 perilously 来修饰 fast，表示“危险地快”。
Not this
The bridge is high perilously.
Use this
The bridge is perilously high.
副词 perilously 修饰形容词 high 时须放在 high 之前，不能放在其后，否则语序错误。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
危险地接近；岌岌可危地接近
The team came perilously close to losing the match.
这支队伍险些输掉比赛，情况十分危险。
薄得危险；瘦得吓人
The ice on the lake was perilously thin.
湖面上的冰薄得危险。
低得危险；少得危险
The helicopter's fuel gauge showed a perilously low level.
直升机的油量表显示油量低得危险。
危险地依赖；极度依赖而处境危险
The economy is perilously dependent on oil exports.
该经济极度依赖石油出口，处境危险。
Use perilously naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记忆法：peril 是危险，perilously 就像在悬崖边行走，每一步都危机四伏。
语域：formal 常见场景：文学作品中、新闻报道中、正式演讲中 perilously 是副词，表示“危险地、危机四伏地”，多用于正式书面语，常见于文学作品、新闻报道等，语气比 dangerously 更书面化。日常口语较少使用。
这些词都以 -ously 结尾。perilously 的末尾 /ləsli/ 与 scandalously、miraculously 的 /ləsli/ 相近；dangerously 为 /rəsli/，curiously、seriously 为 /riəsli/，obviously 为 /viəsli/，与 /ləsli/ 都有区别，注意不要只看拼写而读错。
Dictionary facts from ECDICT, WIKTIONARY.