Lifeline (noun)

1. A rope or cord thrown to a person to help them escape drowning.
2. Something that provides support and helps keep someone from dying or going under.
3. A thing that is vital for survival or success.

Origin:

From 'life' meaning 'the state of being alive' and 'line' meaning 'a rope or cord'.

Examples:

1. The lifeline was thrown to the drowning man and he grabbed it, pulling himself to safety.
2. The lifeline was a lifeline for her, providing her with hope and encouragement in her struggles.
3. The lifeline was a financial lifeline for the struggling company, helping it stay afloat during tough times.
4. The lifeline was a critical lifeline for the patient, providing the necessary medical treatment to save their life.
5. The lifeline was a spiritual lifeline for the lost soul, providing comfort and guidance on their journey.