使う
つかう · tsukau · JLPT N5 · verb-godan
to use
🔧 tsukau sounds like two-cow: farmers use two cows to pull the plough
The kanji 使 = person 亻 + official 吏: a person sent to do a job, hence to employ or use. Same character as in 大使 (ambassador) and 使用 (usage). Say tsu-ka-u, think two-cow, and the meaning to use follows.
使 — person radical 亻 + official 吏
Originally a phono-semantic compound: 亻 (person) gives the meaning and 吏 (official, also a phonetic clue) suggests the sound. The early sense was 'to send a person on a mission,' from which came 'envoy/messenger' and the broader meanings 'to use' and 'to cause/make.'