to be fully satisfied; to feel content because one's needs or desires are met.
彼は仕事も家庭も順調で、金銭的にも満ち足りている。
He is doing well at work and at home and is financially content.
小さな幸せに満ち足りることが大切だと彼女は言った。
She said it's important to be content with small happinesses.
長年の努力の末、ようやく生活が満ち足りるようになった。
After years of effort, his life finally became comfortable and satisfying.
to rise (of the tide); to come in (rare/archaic usage meaning 'to fill' as with the tide).
干潮の後、ゆっくりと海が満ち足りていった。
After low tide, the sea slowly rose.