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establishing oneself in life; success in life
立身出世を志して上京した若者が多かった。
Many young people went to the capital aspiring to success in life.
立身のためには学問が不可欠だと悟った。
They realized that learning is indispensable for success in life.
立身を果たし故郷に錦を飾った。
Having achieved success, they returned to their hometown in glory.