Today’s #kanji is 機, which is listed its semantic element of #きへん（木）. Its phonetic element is 幾. 幾 also has a meaning of “being fine.” 機 originally refereed to a small stick which moved the warp on a weaver.
Meaning: a weaver, machine, chance, etc.
機会（キカイ）: an opportunity, a chance, occasion
機械（キカイ）: a machine, machinery, a mechanism
機関（キカン）: an engine, a machine; a system, an organization, an institution
機器（キキ）: machinery and tools, equipment, an apparatus, a device
機嫌（キゲン）: a mood, a humor, spirits, temper
機能（キノウ）: (a) faculty, (a) function; a feature
機密（キミツ）: a top secret, very secret information
危機（キキ）: a crisis, a critical moment, a danger point
動機（ドウキ）: a motive, an inducement, an incentive