puny

feeble

Weak and ineffective

• frailWeak and breakable
• powerlessLacking strength or authority
• enfeebledMade weak or feeble

debilitated · impotent · sapped · enervated · wimpy · strengthless · helpless · anemic · limp · languid

scrawny

Unattractively thin and bony

• skinnyVery thin, underweight
• bonyThin, with protruding skeleton
• gauntLean from deprivation

scraggy · spindly · underfed · malnourished · wasted · emaciated · skeletal · wispy · reedy · slight

trivial

Lacking significance or weight

• negligibleToo small to consider
• paltryContemptibly meager
• triflingOf no real importance

inconsequential · measly · pitiful · pathetic · meager · piddling · worthless · sorry · laughable · contemptible

tiny

Extremely small in size

• miniatureReduced-scale representation
• undersizedSmaller than standard
• pint-sizedVery small in size

diminutive · runty · stunted · shrimpy · bantam · dwarfed · compact · wee · teeny · itty-bitty

insufficient

Below required quantity

• deficientHaving too little
• lackingBeing without something
• meagerDeficient in quantity

scant · sparse · skimpy · limited · wanting · short · bare · minimal · scarce · poor

• small frysmall fry, small-fry, pipsqueak, little guy, nobody
• Scalevast, immense, huge, enormous, massive
• shortshort, brief, small, little, tiny
• size wordsbig, small, short, large, huge
• smallnesssmall, little, tiny, mini, miniature
• strength wordsstrong, powerful, mighty, potent, robust