be a pillar of strengthif someone is a pillar of strength, they are there to give you help and support at a difficult time 是（…的）精神支柱［坚强后盾］ Christine’s been a pillar of strength to me. 克里斯蒂娜一直是我的精神支柱。
be a pillar of strength• Finally, to my daughter who was a pillar of strength.
→ be a pillar of strength at pillar(3)