Answer:
give in = admit defeat
give out = distribute something
give away = give something for free as a gift or donation
look after = take care of someone or something
look up = search for and find information in a book or database
look into = investigate something
Sentences:
1. He reluctantly gave in to the pressure.
2. I've been giving out leaflets.
3. I gave away all my books.
4. I need to look after my younger sister.
5. I will look up the meaning of this word in dictionary.
6. The police looked into his business dealings.