Firewood
さい, し
しば
None
If you could stop spooning water onto that tree we could use it for brushwood. But if you don't stop, then it will be too wet to burn at all! Stop already!
You finally set the brushwood on fire and suddenly a Shiba (しば) Inu jumps out of the flames. So that's why they named this wood after them or... or vice versa?
Currently there are no similar looking kanji which exist in the WaniKani learning system