俄： e(2) There're two parts,the left one is "人"，which means people. So , 俄 is related to a lot of people , Russian people. 饿：There're two parts of this one as well. The difference is that the left one is the transformation of "食" which means "food ". so 饿 is obviously means hunger. Now, please tell me you got it ?

俄,with the second tone in Pinyin , has more meanings in ancient Chinese ,which are almost not used nowadays . now we just use it to mean Russia ,which is somehow similar in pronunciation . 饿,with the fourth tone in Pinyin , has a different part on its left , I mean "饣", which often helps compose some Characters related to food ,eating ,etc. eg.饱，饭，饮，饺，馆 The right part 我 in both characters indicates their pronunciation somehow ,though not very accurately. May it helps.

the difference is 亻 and 饣

some more: ........................ The right part 我 in both characters indicates their pronunciation somehow ,though not very accurately. (but maybe very accurately in their ancient pronunciations.)

Let me tell you a simple way. ‘俄’, which in second tone, typically means Russia. You can refer to most frequently uesd phrases like '俄罗斯' and ‘俄国'. As far as I know, that's the only 3 words or phrases you will meet in reading.