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The Japanese word

推定

is pronounced
suitei | すいてい
means
presumption, assumption, estimation
Examples:
彼の死は事故だとする君の推定は間違っているようだ。
kare no shi wa jiko da to suru kimi no suitei wa machigatte iru yō da.
Your assumption that his death was an accident seems to be wrong.
この実験の結果、要素Tが構造全体を決定しているという推定が導き出される。
kono jikken no kekka, yōso tī ga kōzō zentai o kettei shi te iru toyū suitei ga michibikidasa reru.
The result of this experiment leads to our presumption that element T determines the entire structure.
Examples sourced from tatoeba.org