verb
to guarantee, to assure
B1
'Garantieren' means to guarantee or to assure (promise reliability). It is a regular weak verb using haben for perfect (hat garantiert). Non‑reflexive and not separable. Past participle 'garantiert'. Used in active assurances; passive forms exist. Common in legal and commercial contexts. Imperative: 'garantiere!'.
Examples
Ich garantiere dir, dass es klappt.
I guarantee you that it will work.
Der Hersteller garantierte, dass das Produkt zwei Jahre halten würde, wenn die Bedienungsanleitung beachtet wurde.
The manufacturer guaranteed that the product would last two years if the instruction manual was followed.
Er garantierte die Qualität.
He guaranteed the quality.
Details
Mnemonics
Picture a certificate stamped 'Guaranteed' when you see the verb
Sounds like English 'guarantee' → 'garantieren'
Notes
garantieren is a regular (weak) transitive verb. It uses 'haben' as auxiliary in compound tenses. Common in business and legal contexts.