numeral
eighteen
A1
Eighteen: cardinal numeral meaning the number 18. Used for age, counting, dates and quantities. In German written 'achtzehn' as one word. No declension; used unchanged in numeral contexts. Pronunciation note: stress on first syllable. Common in dates and ages: 'achtzehn Jahre alt'.
Examples
Meine Schwester ist achtzehn Jahre alt.
My sister is eighteen years old.
Mit achtzehn Jahren zog der Sohn aus, obwohl die Eltern dagegen waren.
At eighteen, the son moved out even though the parents were opposed.
Details
Mnemonics
Picture the number 18 with 'acht' + 'zehn' components
achtzehn = eight + teen (18) — similar to English 'eighteen'
n/a
Notes
Used when giving age and counting; 'achtzehn' is a compound of 'acht' + 'zehn'.