WHOLE CHARACTER
机jī
machine; mechanism; opportunity; crucial point
机 means machine, mechanism, or opportunity; 木 is the old material clue and 几 is the sound clue.
Use 木 and 几 to remember the modern shape. The historical origin of old 机 and the modern simplified form of 機 are distinct.
WOOD MEANING SIDE
木mù
tree; wood
Tree/wood-related meaning clue.
In 机: wood meaning side ZDIC records the wood side as the meaning clue.
SAME-SOUND MODERN COMPONENT
几jī
small table; nearly; jǐ how many
Standalone meaning is kept separate from its role in other characters.
In 机: same-sound modern component 几 has a reading jī, matching 机 jī. The source distinguishes the old tree-name character 机 from traditional 機, whose historical phonetic component is 幾.