A preposition is a part of speech. A preposition with its OP makes up a prepositional phrase. An OP will always be in the objective case. A list of English prepositions is here.
Greek:
Unlike English prepositions, the meaning of Greek prepositions changes based on the case of the OP.
- δια + genitive OP has the meanin of “through”
- δια + accusative OP has the meaning of “on account of”
Study chapter 8 in BBG or this video.
Hebrew:
The major Hebrew prepositions are either bound morphemes or free morphemes. The bound are:
The free morphemes are:
- min;
- את (cf object marker word)
- על (cf here)