英和和英

a steady increase

One takes a new lease of life.

duration as an extension

to shorten one's life―shorten one's days―shorten one's natural term of existence―drive a nail in one's coffin

to prolong one's life―lengthen one's days―add to one's natural term of existence―take a new lease of life

to prolong one's life―lengthen one's days―add to one's natural term of existence

Extend the time limit

change in number, amount, degree (increase in number, amount, degree)

increase

to prolong time

consistently increasing

gradually increase

involving an extended span of time

the act of prolonging one's life

One life is shortened

One's days are shortened.

the rate of increase

to increase progressively

make longer

To extend one's period of stay.

to lengthen―（時なら）―prolong

to be able to extend a period of time

to prolong the time―extend the term

a significant increase

to extend the term

to extend the term

to extend the term

to prolong the term

being increasing cumulatively

to increase greatly