君無しでは生きられない。

indicates location of action; at; in; indicates time of action; indicates means of action; cause of effect; by; and then; so; indicates continuing action; indicates certainty, emphasis, etc.

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

to live; to exist; to make a living; to subsist; to be in effect; to be in use; to function; to come to life; to be enlivened; to be safe (in baseball, go, etc.)