Breakdown of Tämä on tosi kiinnostava aihe.
tämä
this
olla
to be
kiinnostava
interesting
tosi
really (intensifier)
aihe
the topic
Questions & Answers about Tämä on tosi kiinnostava aihe.
Since the current lesson is about the -ittain suffix, how would I use it with the word aihe?
The suffix -ittain / -ittäin (meaning 'by' or 'in groups of') attaches to the plural stem of a noun. For aihe, the plural stem is aihei-, so the distributive adverb form is aiheittain. You could use it to say things like 'by topic' or 'topic by topic'.
The word kiinnostava looks like it comes from a verb. How does it work here as an adjective?
It comes from the verb kiinnostaa (to interest). By adding the -va / -vä ending, you form the present active participle. This turns the verb into an adjective describing what something is currently doing. So, kiinnostava literally means 'interesting' (the thing doing the interesting).
Why use tosi instead of the adverb todella to say 'really'?
While tosi is technically a base noun or adjective meaning 'true', it is extremely common in spoken and informal Finnish to use it as an intensifying adverb meaning 'really' or 'very'. The word todella is the formally correct adverb form, but tosi kiinnostava sounds very natural in everyday contexts.
Why is aihe in the basic nominative case rather than the partitive case (aihetta)?
This is a basic 'A is B' sentence using the verb olla (to be). In these sentences, the noun that follows the verb is a subject complement, not a direct object. Because aihe (topic) is a singular, countable noun, it takes the basic nominative case here rather than the partitive.
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