aspirin
Pronunciation: /ˈasp(ə)rɪn/
noun ( plural or aspirins)
- a synthetic compound used medicinally to relieve mild or chronic pain and to reduce fever and inflammation, usually taken in tablet form: she made herself some tea and took some aspirin
- Alternative name: acetylsalicylic acid; chemical formula: C6H4(OCOCH3)COOH
- (in general use) a tablet of any mild painkilling drug.

Origin:
late 19th century: from German, from acetylierte Spirsäure 'acetylated salicylic acid' (the element Spir- being from the plant genus name Spiraea)

Spelling help
Although it is pronounced ass-prin, remember that aspirin should be spelled with an i in the middle.

if ill, take aspirin.