Castle
Castle
Medival is an incorrect spelling of medieval, which means "middle ages."
Middle ages things and times are called Medieval.
Nui means large of great
The word originates from the Medieval Latin word aptitudowhich actually means "aptitude".
The Greek word for stronghold, taken literally, means a fortress. It is used here as a metaphor to represent things that are based only on human confidence or pride as opposed to those that rely on God's input and guidance.
Year 1000 was a medieval word. It was approximately in the middle of the Middle Ages. It starts with the letter Y.
"Medivial" means nothing. It is a misspelling of the word "medieval " which means "the middle ages."
"Grand" is a word meaning large or wonderful.
The likely word is castle, a large fortified structure dating from medieval times.
Mantis
The Hebrew word for fortress is mivtsar (מבצר) and it comes from the Hebrew root bitser (ב.צ.ר.) which means "to fortify". I'm not sure why you are asking for its meaning: mivtsar means "fortress" in Hebrew, but you already know that. Another Hebrew word for fortress is metzudah (מצודה). The origin of both these Hebrew words is the Hebrew Bible (2 Samuel 5:7, and Numbers 32:36, respectively). Perhaps you are thinking of the particular fortress near the Dead Sea called Masada. In addition to being a physical fortress, the idea of Masada connotes the heroism and martyrdom of those Jews who resisted the Roman Occupation there.