Pronominal adjectives
There are many adjectives that use the same endings as pronouns like tad. We can call these adjectives pronominal adjectives since they are adjectives that behave like pronouns.
Here are some common examples:
पूर्व → पूर्वस्मिन् दिने
pūrva → pūrvasmin dine
previous → on the previous dayपर → परस्मिन् दिने
para → parasmin dine
next → on the next dayएक → एकस्मिन् दिने
eka → ekasmin dine
one → on a certain dayअन्य → अन्यस्मिन् दिने
anya → anyasmin dine
other → on another dayसर्व → सर्वे नराः
sarva → sarve narāḥ
all → all menविश्वे → विश्वे देवाः
viśve → viśve devāḥ
all → all gods
But there is one small exception. Apart from anya and a few rarer stems, all of these pronominal adjectives use -m in the neuter singular of cases 1 and 2:
एकम् फलम्
ekam phalam
one fruitसर्वम् उदकम्
sarvam udakam
all the waterअन्यत् फलम्
anyat phalam
another fruit