crane; derrick
Refers to a lifting machine used in construction, shipping, etc. The loanword クレーン is more common in everyday speech.
See also: クレーン
港で起重機がコンテナを持ち上げている。
A crane is lifting a container at the port.
crane ship; floating crane
Compound of 起 (raise) + 重 (heavy) + 機 (machine). The exact historical derivation is uncertain, but the kanji transparently describe a machine for lifting heavy objects.