吐
ト, は.く, つ.く
spit, vomit, belch, confess, tell (lies)
JLPT1 G7 S6 F1674
As per
土
# (pile) +
口
mouth → pile of vomited objects → *spew/vomit* → *exhale*; *belch*; *disgorge*; *spit*. Also, *utter* and *say*.
[Full Kanji Etymology List]