noun
essential utilities; critical infrastructure
Refers to utilities and services essential for daily life, such as electricity, gas, water, and communications. Often used in disaster contexts.
地震でライフラインが止まった。
The lifelines (utilities) were cut off due to the earthquake.
ライフラインの復旧には数日かかる見込みです。
Restoration of essential utilities is expected to take several days.
noun
lifeline; vital connection
A figurative or literal line that provides crucial support or rescue; can refer to a rope, a communication link, or an indispensable person or thing.
彼女は私にとってライフラインのような存在だ。
She is like a lifeline to me.
救助隊がライフラインを投げてくれた。
The rescue team threw us a lifeline.