I dont know if this kanji is a part of TF, I know it from WK.
I was having issues with 太陽, i kept typing だいよう instead of たいよう, so I came up with this little mnemonic.
“you Tie(たい) a rope around the sun” I know the mnemonic doesnt cover the “よう” part, but that wasnt the part I was having trouble with when I created the mnemonic. I guess I could make it
“with some rope, tie(たい) the big sun to you(よう)”