Learn Turkish: Bükülmez çelik parçaları fabrikada birleştirmek zordur. - It is difficult to assemble unbendable steel parts in the factory.

It starts with the verb root bük- (to bend). First, we add the passive suffix -ül to get bükül- (to be bent). Then, we add the negative aorist participle -mez, which turns the verb into an adjective. Literally, it means "that which is not bent" or "unbendable."

Why does parçaları end with the -ı suffix? Is it a noun compound?

The -ı here is actually the definite accusative suffix, not a possessive compound marker. The phrase bükülmez çelik parçalar is the direct object of the verb birleştirmek (to assemble). Because materials like çelik (steel) act as simple adjectives in Turkish, they don't form noun compounds. We just add the accusative -ı to the plural noun to show we are assembling those specific parts.

How do the suffixes in birleştirmek create the meaning "to assemble"?

It is built from the number bir (one). The suffix -leş turns it into the verb birleşmek (to become one, to unite). Then, the causative suffix -tir makes it birleştirmek (to make become one), which gives us the meaning "to assemble" or "to join together."

What is the purpose of the -dur suffix on zordur?