What does はず mean?
はず is a Japanese noun meaning “it should be so” in English. It can also be translated as “nock (of a bow), nock (of an arrow), nock-shaped grip (between thumb and forefinger)” depending on context. It is written as はず in hiragana, and hazu in romaji. This word is part of JLPT N4 vocabulary.
Example sentence
その飛行機は今ごろは関西空港に当然着いているはずだ。
The plane should have arrived at Kansai Airport by now.