Halo, Nimaa :)
"paham" can be a verb or a noun. It depends on context.
- "paham" as a verb.
Means "understand". It is used when it shows understanding. Or.... when you want to say that you understand.
e.g.: I UNDERSTAND this lesson. (Saya PAHAM pelajaran ini)
- "paham" as a noun.
Means "stream". It is used when it shows stream, genre.
e.g.: liberalism, socialism, communism. The suffix on those three words, "-ism" can be translated as "paham" in Bahasa Indonesia. So, those three words in Bahasa Indonesia are: liberalism = PAHAM liberal; socialism = PAHAM sosialis; communism = PAHAM komunis.
next is "memahami" :D
"memahami" is a verb, means "understand". Word "paham" is a root/basic word of "memahami". When "paham" is added with suffix, it becomes "memahami". The difference between "paham" and "memahami" here is "paham" doesn't need an object behind, but "memahami" needs an object behind. Like Aisya explained above :)
selamat belajar, Nimaa :) :) :)