ˈhaɪ̯sə
* "hei" sounds like the English word "high" but with a shorter "i" sound.
* "sse" sounds like the English word "say" but with a shorter "e" sound.
Therefore, the stress is on the first syllable ("hei").
It's important to note that "heisse" is a common word in German and can have multiple meanings depending on the context. It can be the feminine form of the adjective "heiß" (hot), the plural form of the adjective "heiß" (hot), or a verb in the present tense (to call).