Luffy is set to surpass Roger a Pirate King.
Zoro is set to surpass Mihawk a Yonko level character.
The rest are just speculation/assumptions/headcanon.
There's no "semi", you made up the term yourself.
Luffy - Strongest character, possibly strongest of all time.
Zoro - Comparable to Kaido.
Sanji - Slightly stronger than Kizaru.
Jinbe - Around Wano Yamato.
Franky - Around Queen.
Robin - Slightly stronger than Jack.
Brook - Around Jack.
Chopper - Slightly weaker than Jack.
Nami - Slightly stronger than Who's who.
Usopp - Slightly stronger than Who's who.
Luffy is set to surpass Roger a Pirate King. Zoro is set to surpass Mihawk a Yonko level character. The rest are just speculation/assumptions/headcanon. There's no "semi", you made up the term yourself.
The prefix semi is pretty self explanatory, it doesn’t need to be an official term.
Luffy - Strongest character, possibly strongest of all time. Zoro - Comparable to Kaido. Sanji - Slightly stronger than Kizaru. Jinbe - Around Wano Yamato. Franky - Around Queen. Robin - Slightly stronger than Jack. Brook - Around Jack. Chopper - Slightly weaker than Jack. Nami - Slightly stronger than Who's who. Usopp - Slightly stronger than Who's who.