Sophisticated (پیچیدہ اور نفیس) means having a great deal of worldly experience, or (of a machine) being 'complicated and refined' (جدید).

Solipsistic (خود غرض) is a philosophical theory that one's own self is all that exists. It describes an attitude that is extremely 'selfish' (خود غرض) or 'self-centered' (خود مرکز)، ignoring the needs or realities of others.

Solemn (سنجیدہ) means formal, dignified, and serious. It is often used to describe 'ceremonies' (تقریبات) or formal occasions. 'Irreverent' (غیر سنجیدہ) is an antonym.

Software (سافٹ ویئر) refers to the 'computer programs' (کمپیوٹر پروگرام) and operating systems used by a computer, as opposed to the physical 'hardware'.

Smug (خود مطمئن) means having or showing excessive pride in oneself or one's achievements. 'Self-satisfied' (اپنے آپ سے راضی) is a direct synonym.

Sluggish (سست) means 'slow' (آہستہ) -moving or inactive; lacking energy.

To slue (مڑنا) (or 'slew') means to 'twist or skid' (پھسلنا) around or to turn on a pivot. 'Slew' (as a noun) means a large number.

Slew (بہت بڑی تعداد) (often as 'a slew of') is an informal term for a 'large number' (بڑی مقدار) or a great quantity of something. 'Slue' means to twist.

To skulk (دبکنا) means to keep out of sight, typically with a sinister or cowardly motive. 'To lurk' (گھات لگانا) or move stealthily is a direct synonym.

A simile (تشبیہ) is a figure of speech involving the 'comparison of one thing with another' (ایک چیز کا دوسری سے موازنہ) of a different kind, using 'like' or 'as' (e.g., 'as brave as a lion').