עָרְמָה

τοῦ δὲ πολέμου οἱ καιροὶ οὐ μενετοί → in war, opportunities won't wait | the chances of war will not wait (Thucydides 1.142.2)

English (Strong)

feminine of עֹ֫רֶם; trickery; or (in a good sense) discretion: guile, prudence, subtilty, wilily, wisdom.