縄
ジョウ, なわ, ただ.す

straw rope, cord

JLPT1 G7 S15 F1075

糸 thread + 黽 frog/amphibious creature. It is likely that 黽 has replaced an obsolete element. The adoption of 黽 may have been intended to indicate a rope-like pattern on the back of a particular type of frog → *rope*.

[Full Kanji Etymology List]