lachhaft
ridiculous
So absurd, nonsensical, or inadequate that it provokes mockery or laughter; laughable.
Sein Angebot von zehn Euro für das alte Auto war einfach nur lachhaft.
His offer of ten euros for the old car was simply ridiculous.

ridiculous
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ridiculous
So absurd, nonsensical, or inadequate that it provokes mockery or laughter; laughable.
Sein Angebot von zehn Euro für das alte Auto war einfach nur lachhaft.
His offer of ten euros for the old car was simply ridiculous.

The word is made up of the stem of the verb 'lachen' (to laugh) and the ending '-haft'. The ending '-haft' often means 'similar to' or 'causing', so something is 'lachhaft' (ridiculous) if it makes people want to laugh, usually mockingly.
Die Idee, ohne Training einen Marathon zu laufen, ist lachhaft.
The idea of running a marathon without training is ridiculous.
'Lachhaft' (ridiculous) is often used to describe things that are completely inadequate or absurd. Typical combinations are 'ein lachhaftes Angebot' (a ridiculous offer), 'eine lachhafte Summe' (a ridiculous amount), or 'eine lachhafte Ausrede' (a ridiculous excuse).
Er bot mir für mein Fahrrad 20 Euro. Das ist eine lachhafte Summe!
He offered me 20 euros for my bike. That's a ridiculous amount!
The word is not neutral. It expresses strong mockery and rejection. When you call something 'lachhaft' (ridiculous), you are saying that you absolutely cannot take it seriously.
Seine Drohungen sind lachhaft, niemand hat Angst vor ihm.
His threats are ridiculous; nobody is afraid of him.
funny / strange
'komisch' and 'lachhaft' can both refer to something people laugh about. The difference is in the tone. 'komisch' can be friendly and positive when something is funny. But it can also simply mean strange. 'lachhaft' is clearly more negative: you find something so nonsensical, bad, or absurd that you cannot take it seriously. Learners may confuse the words because both are connected with laughter. But 'lachhaft' often sounds like criticism or mockery. For a nice joke, you say 'komisch', not 'lachhaft'.

Das Angebot war lachhaft, weil der Preis viel zu niedrig war.
The offer was ridiculous because the price was far too low.
Der Witz in der Pause war so komisch, dass alle lachen mussten.
The joke during the break was so funny that everyone had to laugh.