ゼツ, た.える, た.やす, た.つ
discontinue, beyond, sever, cut off, abstain, interrupt, suppress
JLPT3 G5 S12 F784
The relevant seal inscription form of the right-hand element# is an abbreviated form of 切 cut + 巴 (person spread flat on the ground) → cut people who have submitted into pieces → *kill (off)* (compare 殺). The addition of 糸 thread indicates "cut animate and inanimate things into pieces" → *sever* → *die out*; *reject*; *stop*; *entirely* → *splendid* (← entirely different from/superior to others). 絶 replaces the right-hand element with 色.
[Full Kanji Etymology List]