To subvert (تختہ الٹنا) means 'to undermine' (کمزور کرنا) the power and authority of an established system.

Subtle (لطیف) means so delicate or precise as to be difficult to analyze. It implies a 'clever' (ہوشیار) or delicate use of understanding or skill.

Subterfuge (حیلہ) is deceit used to achieve one's goal. A false 'excuse' (بہانہ) is a common form of subterfuge.

To subside (کم ہونا) means to become less intense, violent, or severe; 'to become less agitated' (کم پریشان ہونا).

To subjugate (غلام بنانا) means to bring under domination or control, especially 'to conquer' (فتح کرنا) a people. 'Free' (آزاد کرنا) is the antonym.

Stringent (سخت) (of regulations or conditions) means strict, precise, and 'severe' (شدید). 'Soft' (نرم) or 'lax' is an antonym.

A stricture (سخت تنقید) is a 'severe criticism' (شدید مذمت) or censure. It also means a restriction on a person or activity.

A stratagem (جنگی چال) is a plan or 'scheme to deceive' (دھوکہ دینے کا منصوبہ) an enemy or achieve a goal.

Straits (مشکلات) (plural) refers to a situation of 'difficulty' (پریشانی) or distress, especially financial (e.g., 'in dire straits').

To straddle (ٹانگیں پھیلا کر بیٹھنا) means to sit or stand with 'one leg on either side of' (دونوں طرف ایک ایک ٹانگ رکھنا) something, like straddling a horse.