寄り掛かる
よりかかる · yorikakaru · JLPT N1 · noun
to lean on
🪑 寄る (draw near) + 掛かる (hang on) = draw near and hang on: lean against
寄る means to draw near and 掛かる means to hang on or be hung on. Together they describe moving close and resting your weight on something. The rely-on sense extends this to leaning your weight on a person.
寄 — roof 宀 + strange 奇 (phonetic)
A semantic-phonetic compound: the roof radical 宀 suggests a dwelling or shelter, while 奇 (qí) supplies the sound, shifted to jì. The original sense was to lodge or stay temporarily under someone's roof, which extended to entrusting, depositing, and eventually sending or mailing things to another's care.