
interessant
interesting
Arousing attention or curiosity; engaging or worth knowing about.
Das Buch, das ich gerade lese, ist wirklich sehr interessant.
The book I'm currently reading is really very interesting.
interesting
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interesting
Arousing attention or curiosity; engaging or worth knowing about.
Das Buch, das ich gerade lese, ist wirklich sehr interessant.
The book I'm currently reading is really very interesting.

attractive / worthwhile
Advantageous, worthwhile, or profitable, especially in a financial or business context.
Für junge Familien ist dieses Haus aufgrund des niedrigen Preises sehr interessant.
For young families, this house is very attractive because of the low price.

interesting
A euphemistic or ironic description for something that is strange, unusual, or odd.
Er hat eine, sagen wir mal, interessante Frisur.
He has a, let's say, interesting hairstyle.
'Interessant' (interesting) is very often used in the constructions 'Ich finde etwas interessant' (I find something interesting) or 'Es ist interessant, dass ...' (It is interesting that ...) to express a personal opinion or a general observation.
Ich finde diesen Film sehr interessant.
I find this film very interesting.
To express for whom something is interesting, use the preposition 'für' followed by the accusative.
Dieses Jobangebot ist besonders für Absolventen interessant.
This job offer is especially interesting for graduates.
When 'interessant' (interesting/attractive) is used in a business or financial context, it often means 'vorteilhaft' (advantageous) or 'lohnenswert' (worthwhile). Watch for signal words like 'Preis' (price), 'Angebot' (offer), 'Rendite' (return), or 'Konditionen' (terms).
Mit dieser Rendite wird die Geldanlage für Investoren interessant.
With this return, the investment becomes attractive for investors.
'Interessant' (interesting) can be a polite or ironic paraphrase for 'seltsam' (strange) or 'merkwürdig' (odd). The true meaning here depends heavily on the tone of voice and the situation.
Deine Idee, im Winter zu zelten, ist ja... interessant.
Your idea of camping in winter is, well... interesting.
exciting
A book or lecture can be both interessant and spannend because both capture attention. Interessant emphasizes curiosity or informative content, while spannend additionally expresses excitement and anticipation about what happens next. Use spannend when you absolutely want to know how things will continue.

Das Buch ist interessant, weil es verständlich erklärt, wie Vulkane entstehen.
The book is interesting because it clearly explains how volcanoes form.
Das Buch ist spannend, weil man bis zum Ende wissen möchte, ob die Forscher den Ausbruch verhindern.
The book is exciting because you want to know until the very end whether the researchers will prevent the eruption.