weak
adj.adj. lacking physical strength or power. You use this to describe someone who is not strong or something that breaks easily.
adj. lacking physical strength, energy, or the ability to resist external force. Often used to describe a lack of intensity in flavor, light, or logical argument.
My legs feel weak after the long run.
The bridge was closed to heavy trucks because the old wooden supports had become too weak to carry the weight.
The defense attorney argued that the prosecution's case was built on weak evidence and hearsay, failing to meet the burden of proof required for a conviction.
From Middle English weyk, wayk, weik, waik, from Old Norse veikr (“weak”), from Proto-Germanic waikwaz (“weak, yielded, pliant, bendsome”), from Proto-Indo-European weyk- (“to bend, wind”). Cognate with Old English wāc (“weak, bendsome”), Saterland Frisian wook (“soft, gentle, tender”), West Frisian weak (“soft”), Dutch week (“soft, weak”), German weich (“weak, soft”), Norwegian veik (“weak”), Swedish vek (“weak, pliant”), Icelandic veikur (“bendsome, weak”). Related to Old English wīcan (“to yield”). Doublet of week and wick.
Gradable adjective; commonly modified by degree adverbs like 'very' or 'extremely'.