The word "tantum" is often used in legal contexts, such as in the phrase "in tantum" (to such a degree) or "pro tanto" (to that extent).
Here are some examples of how "tantum" can be used:
* Tantum quantum (as much as is necessary)
* Tantum modo (only, merely)
* Tantum et non ultra (so much and no more)
It's important to note that "tantum" is a relatively uncommon word in modern English. However, understanding its meaning can be helpful when encountering legal documents or Latin phrases.