ダイ, タイ, うてな, われ, つかさ
pedestal, a stand, counter for machines and vehicles
JLPT4 G2 S5 F262
囗 circular enclosure + 厶# (plow) → exert heavy downward pressure in plowing furrows into an enclosed field → *counter for machines* → *counter for cars*. In Japan, 台 was also adopted as a Shinjitai (new character form) to replace 臺, according to which 台 also bears the meanings *platform* and *pedestal*.
[Full Kanji Etymology List]