Learn Finnish: Miksi jokainen pajassa tehty maljakko on ainutlaatuinen? - Why is every vase made in the workshop unique?

In Finnish, when a participle like tehty (made) describes a noun, it acts like an adjective and goes before the noun. If the participle has its own modifiers, like where it was made (pajassa), that entire phrase must stay together and go immediately before the participle. So we get pajassa tehty maljakko (literally 'in the workshop made vase').

What form of the verb is tehty here, and why?

It is the passive past participle (TU-participle) of the verb tehdä (to make/do). We use the passive form because it describes a vase that 'was made' by someone, without specifying exactly who made it.

Do all the words in the phrase jokainen pajassa tehty maljakko need to match cases if we use it as an object?

The pronoun jokainen, the participle tehty, and the head noun maljakko all agree and must be in the same case. However, the adverbial pajassa is 'locked' in the inessive case because it answers 'where?'. If you said 'I admire every vase made in the workshop', it would become Ihailen jokaista pajassa tehtyä maljakkoa.

How is the long word ainutlaatuinen built?

It is a compound built from ainut (only/single) and laatu (quality/kind), plus the common adjective suffix -inen. Put together, it literally means 'of a single kind', which translates perfectly to 'unique'.