What does debile mean?
Debile is a formal English adjective meaning physically or mentally weak — lacking strength, vigour, or effectiveness. It can describe a person weakened by illness or age, but also, by extension, anything feeble, such as a debile argument or a debile economy. The word comes from the Latin debilis, formed from de- ('away from') and the root of habere relating to power or ability — making it an etymological cousin of words like ability and habit. Although once more current, debile has largely retreated into literary, medical, and scholarly registers, where it survives alongside its far more common relatives debility and debilitate. A reader encountering it should understand that calling something debile is not merely noting mild tiredness but asserting a pronounced, often lasting lack of strength or force.
Physically or mentally weak; lacking strength or vigour.
"The convalescent soldier remained debile for months after his discharge."
Feeble or ineffective; wanting force or soundness (of arguments, efforts, or institutions).
"Critics called the government's response a debile attempt at reform."
Debile and 'able' are cousins — both trace back to the Latin root for power, so this little adjective literally means 'un-able'.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of debile
Debile derives from the Latin adjective debilis, meaning weak or infirm, built on de- plus the Indo-European root *ghabh- ('to give or hold'), which also yields habilis ('handy, able') and hence English able and ability. The word entered English via French débil in the early 16th century. Its derivative family grew soon after: debility appeared in the same era, and debilitate followed in the 16th–17th centuries, becoming the dominant form in modern usage while the bare adjective debile grew rarer.
Related word forms
How debile is actually used
Debile is a formal or literary word and sounds dated in ordinary conversation; 'weak', 'feeble', or the derived forms of debilitate are more common today. It carries a slightly clinical or bookish connotation.
Easily confused with debile
Debile is an adjective meaning weak, while debilitate is a verb meaning to make someone weak.
Debel is an unrelated rare verb meaning to subdue by war, whereas debile describes physical or mental weakness.