Unable to do well at a particular task or thing. Useless is mildly insulting.
Without use or possibility to be used.
Good-for-nothing; not dependable.
Unhelpful, not useful; pointless (of an action).
Invigorating or life-giving.
Very important.
Containing life; living.
Necessary to continued existence.
Necessary to the continuation of life; being the seat of life; being that on which life depends.
Capable of living; in a state to live; viable.
Relating to the recording of life events.
Relating to, or characteristic of life.