The bulk update request #74 has been approved by @EasyV.
rename tarinai -> premature_yukkuri
"tarinai" or "足りない" is not a term used specifically in Simyukkuri.
That's how Japanese call premature / defected / retarded yukkuris.
http://yukkuri-futaba.sakura.ne.jp/dictionary/article.html?key=a4a6f7bc3c96c924dae814c31965c3da
https://w.atwiki.jp/yukkurifutaba/pages/31.html#id_4908dbed