If you have dug up earth, as opposed to potting soil, I'd suggest it looks very like perennial sweet pea, Lathyrus latifolius. Do you have any in your garden?

Isn't the leaf shape and venation wrong for L. latifolius? this looks like something I've seen before....I need to think a while...

I assumed there were two plants in that pot and this one was a surprise. The more heart shaped/oval leaf looks like pothos. It is quite different in conformation than the leaves I can say I definitely see coming from the unusual stems. The ones I see attached to the stems in question are very similar to lathyrus.

To me it looks like a single plant and not Lathyrus. The leaves I can see appear to be slightly felted or hairy, so not Pothos.

No idea, but maybe time for a couple classic questions... Is there any odor if you tear a leaf? What color is the sap?

I chalked that up to fuzzy focus but some elaboration from the OP would help. It makes you wonder if they ever come back on to see an answer. ;-)

I'm going to say it's pokeweed because 90% of the time, it IS pokeweed. Just kidding! Have no idea what it is, but that's some funky soil it's growing in :) .

the STEMS sort of remind me of an impatiens..not the leaves though. and not the bulging, so ????

The stems look familiar to me, and I believe it's a weed rather than a garden plant. Most likely I encountered it in IL, NC, CT, or CA, but then again, possibly OH -- or a few other states....

Yeah, I know this is super-helpful.

I would suggest posting another photo of the entire plant. That might help.

Pepper plant perhaps? Finally occurred to me what it reminded me of.

What sort of pepper, purple? Capsicum, Piperaceae, something else?

The OP's plant has opposite stems and probably opposite leaves. I don't grow Capsicum, but I believe their stems are alternate.

I think it's a weed, too. I'm going to guess Solanum.

Jaynine, I had that thought for a moment too. S. dulcamara.

Sorry, I meant Capsicum by pepper plant. Too lazy to find the latin. I think I've had straggly bell pepper or jalapeno plants that looked like that.

Maddeningly familiar.

I think Solanum has alternate leaves . By the way, we have no clue as to the location. There is nothing on the OPs page to identify where she gardens.

That's much more scientific than the gut instinct method I applied to this one, Carol. Hopefully Roslyn is having a fantastic time on a beach or something & will come back to this when life gets so boring again.

In case this is one of those never visited again by the OP, here's an upright, somewhat cropped version of the pic to continue considering.

The answer 'yes' to the question about odiferous leaves would point to Solanum!

If it helps, the OP lives in India.

Maybe it is Achyranthes aspera, rough chaff, prickly chaff, which is found in India.

Here is a link that might be useful: Achyranthes aspera

Keep gettig drawn back to something in the gesneriaceae family?

Hey guys I'm really sorry for late reply my internet was not working. Well when I tear leaves I don't see any sap or strange smell. This is the latest pic of the plant. In morning time I see very tiny buds of pink colour but never saw any flower. The leaves are bit hairy and so is the stem.

Roslyn, welcome back, that sounds really frustrating (and not nearly as fun or mysterious away-on-a-beach thing I mentioned!) Thanks for the added clues. I'm sure I don't know what it is, but someone should if 'we' keep trying. I think your last pic got lost in space though. Try again?

Well I mean the pic I've put up is the latest pic. This plant is pretty strange and I'm sure it's not Pothos or Solanum. Hope to find it out soon.