What does clogged mean?
To describe something as clogged is to say that it has become blocked, usually by an accumulation of material that prevents normal flow or movement. A drain can be clogged with hair, arteries with plaque, pores with oil, and roads with traffic — in each case the essential idea is obstruction. The word functions chiefly as the past tense and past participle of the verb 'to clog', but it also stands alone as an adjective describing the state of being blocked. It is a workmanlike, everyday term rather than a literary one, appearing constantly in plumbing guides, medical advice, and news reports about congestion. Its tone is practical and slightly negative, since a clogged thing is by definition not working as it should. The closely related noun 'clog' has an entirely different historical life as well, referring to a heavy wooden shoe or to a lump or weight — a reminder that this short, sturdy word has long been associated with heaviness and obstruction. Knowing 'clogged' is useful precisely because it names a universal nuisance in a single syllable pair.
Blocked or obstructed so that flow, passage, or movement is hindered.
"The filter was clogged with dust and needed cleaning."
To block or fill something so that movement or flow through it is impeded.
"Fallen leaves clogged the gutter."
In a state of being blocked or congested.
"She complained of clogged sinuses all week."
Your kitchen sink and your arteries have more in common than you'd think — both can end up clogged.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of clogged
'Clogged' is the past participle of the verb 'clog', which entered English in the Middle English period. The ultimate origin of 'clog' is uncertain, though it has long been connected with the sense of a heavy lump or block of wood — the same root that gives us the noun 'clog' meaning a wooden shoe, common in northern England and Wales. The verb came to mean 'to encumber or obstruct' by the 16th century, and the sense of blocking pipes or passages developed naturally from the idea of loading something down with a heavy mass. Because its deeper origins are obscure, no confident cognates outside English can be reliably listed.
Related word forms
How clogged is actually used
'Clogged' is neutral in register, used freely in both everyday speech and formal writing, though it appears most often in practical contexts such as plumbing, medicine, and traffic reporting. In British English it is frequently heard as 'clogged up', a phrasal form common in casual speech. The word carries mildly negative connotations, implying dysfunction, delay, or poor maintenance.
Easily confused with clogged
Flogged means beaten with a whip, while clogged means blocked or obstructed — they look and sound similar but are entirely unrelated in meaning.
Not a separate word, but note that 'clogged' already implies blockage; adding 'up' ('clogged up') is common informally but redundant in careful writing.