What is a synonym for puny?

Here are some synonyms for "puny", depending on the context:

General weakness:

* Small

* Tiny

* Weak

* Frail

* Feeble

* Insignificant

* Meagre

* Paltry

* Unimpressive

* Pathetic

Physical size:

* Petite

* Diminutive

* Little

* Scrawny

* Undersized

Strength/Effort:

* Weakling

* Lame

* Incompetent

* Ineffective

* Unworthy

* Worthless

For specific situations, you might use:

* Midget (for size)

* Shrimp (for size)

* Pygmy (for size)

* Miniscule (for size)

The best synonym will depend on the specific context of your sentence.