舌した足たらず

noun, na-adjective, noun which may take the genitive case particle 'no'

unclear speech; poor enunciation

Describes speech that is physically hard to understand, often due to slurring, mumbling, or a speech impediment. Can also refer to a child's immature pronunciation.

• 彼かれの説せつ明めいは舌した足たらずで、何なにを言いっているのかよくわからなかった。

  His explanation was unclear and I couldn't really understand what he was saying.

• まだ小ちいさいので、少すこし舌した足たらずな話はなし方かたをする。

  Because he's still little, he speaks with a bit of a lisp.

noun which may take the genitive case particle 'no', na-adjective, noun

poorly expressed; inadequate explanation

Refers to expression that is logically or linguistically insufficient, leaving the listener with an incomplete understanding. Often used for explanations, arguments, or wording that lacks clarity or detail.

• 彼かれの提てい案あんは舌した足たらずで、具ぐ体たい的てきな内ない容ようがほとんどなかった。

  His proposal was poorly expressed and had almost no concrete details.

• この説せつ明めい書しょは舌した足たらずで、初しょ心しん者しゃにはわかりにくい。

  This manual is inadequately explained and hard for beginners to understand.