IPA: /ˈwiːkli/
KK: /ˈwikli/
The least strong or powerful; having the lowest strength or effectiveness.
He performed the weakliest in the competition, struggling to keep up with the others.
Comparative: weaker
Superlative: weakliest
Weakliest → It is formed from "weak" (from Old English *wēac*, meaning lacking strength) and "-ly" (meaning in a manner of) and "-est" (meaning the most). The word "weakliest" means in the manner of being the most weak or lacking strength.
Think of someone who is 'lacking strength' ('weak') and doing so 'in a manner' ('-ly') that is 'the most' ('-est'). This helps you remember that 'weakliest' refers to the most lacking in strength.
No commonly confused words.