strengthless

Mane (Îngilîzî)

1. Being powerless or weak; lacking strength.
2. Having no special abilities or talents; lacking strengths.

Hevwate

feeble

weak

powerless

flimsy

fragile

frail

humble

impossible

impotent

languishing

languorous

light

pale

puny

sappy

sleazy

slender

slimsy

soft

softy

thin

twiggy

underdog

underfed

wan

washy

anemic

sinewless

delicate

docile

Werger

sin fuerza

schwach

kraftlos

blutarm

leicht

machtlos

schwächlich

schlaff

demütig

weich

zart

αδύνατος

ανίσχυρος

debole

bleich

Etîmolojî (Îngilîzî)

Ji Middle English mîras hatiye girtin: strengthles

In summary

From Middle English strengthles, streintheles, strencthelæs, equivalent to strength + -less.