•Start from scratch (idiom) -
To start from the very beginning; to start from nothing. （自食其力，从零最先）
1.Nothing like this had ever been done before, so we had to start from scratch.
2.I built every bit of my own house. I started from scratch and did everything with my own hands.
•Devote oneself to sth/ *** (phrasal verb) -
To give your time or effort completely to something you believe in or to a person.（致力于……，献身于……）
1.She devoted herself to raising her children.
2.Over half his speech was devoted to the issue of saving Social Security.
•All by/on one's lonesome (idiom) -
All alone; by oneself.（独自地，寥寂地）
1.Don't leave your puppies all on their lonesome.
2.Mary's folks went out and left her all by her lonesome.
•Dispense with *** /sth (phrasal verb) -
To no longer use someone or something because you no longer want or need them.（免去，舍弃）
1.I think we all know each other, so we can dispense with the formalities.
2.We will have to dispense with the expensive gifts this year.
•Solicitude (noun) -
Care or concern for someone or something.
1.I was touched by his solicitude.
2.He would look after his friends with rather touching solicitude.