This is the 3933rd most frequent Japanese word.
サバ
Mackerel.
Again, "サバ" here refers to the actual fish 'mackerel', showing its literal sense.
市場で新鮮なサバを見つけました。
I found fresh mackerel at the market.
Here, "サバ" refers to the fish 'mackerel'.
サバは魚の一種です。
Mackerel is a type of fish.
In this context, "サバ" is part of the phrase "サバを読む", meaning to cheat or manipulate numbers, often in one's favor.