difference between 짓다 and 지다
짓다 = to make / build
in present tens informal it's irregular and ㅅ remove so it become: 지어
other side
지다 = lose
in present tens informal it become: 지어

So how do I know the difference?

Question

difference between 짓다 and 지다
짓다 = to make / build
 in present tens informal it's irregular and ㅅ remove so it become: 지어
other side
지다 = lose
in present tens informal it become:  지어

So how do I know the difference?

Answer

Context clues. Infer which one they mean by the context of the sentence/convo

Answer

지다 becomes 져. Nobody would say 지어 in real life, using "long" versions is a bit literary.
In the same way that for 주다 and 보다 we say 줘 and 봐, instead of the long 주어 and 보아.
내가 졌어 = I lost (nobody would say 지었어)

I don't think we can shorten 짓다 to 져, it seems like it's always 지어, 지었어.
제 한국 친구가 지어 준 이름이에요 = My korean friend made this name for me 
져 준 wouldn't sound right, to my ears at least. I'm not a native speaker so I might be wrong.

Answer

Context is always very important. We do that in English too.

لا تفوّت فرصة تعلّم لغة جديدة وأنت مرتاح في منزلك. تصفّح مجموعتنا المختارة من مدرّسي اللغات ذوي الخبرة وسجّل في درسك الأول الآن!