It is a 9 letter word 123456789 , If you lose it u die

Let the word be HEARTBEAT.

If we lose heartbeat then we shall die.

If we have 234 means “EAR” we can 1234 means “HEAR”.

56 means”TB” is one type of disease.

Exact time and location is indicated by 89 means “AT”

2&7 are same letter-”E”

3&8 are same letter-”A”

5&9 are the same letter-”:A”.

It is a 9 letter word 123456789 , If you lose it u die, If u have 234 , you can 1234 , 56 is one type of disease, 89 indicates exact location and time, 2 and 7 are same letter, 3 and 8 are same letter, 5 and 9 are same letter. The word is HEARTBEAT