Ideogram (指事) - many (廿) termites (禼) taking grain (米) and hiding it in their nest (穴), hence the definitions "secretly", "stealthily", "to steal". In modern form, 米 looks like 釆 because 廿 has become one stroke and merged with 米.
竊 (radical 116 穴+17, 22 strokes, cangjie input 十金竹木月 (JCHDB), four-corner 30927)
Notes for Old Chinese notations in the Baxter-Sagart system:
* Parentheses "()" indicate uncertain presence;
* Square brackets "" indicate uncertain identity, e.g. *[t] as coda may in fact be *-t or *-p;
* Angle brackets "<>" indicate infix;
* Hyphen "-" indicates morpheme boundary;
(uncommon “Hyōgai” kanji, kyūjitai kanji, shinjitai form 窃)
Not used in modern Japanese. Superseded by the 新字体 (shinjitai, “new form”) of 窃.
竊 • (jeol) (hangeul 절, revised jeol, McCune-Reischauer chŏl, Yale cel)