s. tek, bir tane. This could be our only chance. (Bu bizim tek şansımız olabilir.)

z. sadece, yalnızca. It’ll only take a few minutes. (Sadece birkaç dakika sürecek.)

One alone; single; as, the only man present; his only
occupation.

Alone in its class; by itself; not associated with others of
the same class or kind; as, an only child.

Hence, figuratively: Alone, by reason of superiority;
preeminent; chief.

In one manner or degree; for one purpose alone; simply;
merely; barely.

So and no otherwise; no other than; exclusively; solely;
wholly.

Singly; without more; as, only-begotten.

Save or except (that); – an adversative used elliptically
with or without that, and properly introducing a single fact or
consideration.