終始(しゅうし)beginning and end, from beginning to end, doing a thing from beginning to end, consistently, the whole time

容疑(ようぎ)者(しゃ)が終始(しゅうし)沈黙(ちんもく)を守(まも)っています。

The suspect has remained silent from beginning to end. {beginning and end, from beginning to end, doing a thing from beginning to end, consistently, the whole time}

防戦(ぼうせん)に終始(しゅうし)する試合(しあい)はとにかく厳(きび)しかった。

The match, which was defensive from beginning to end, was simply tough. {beginning and end, from beginning to end, doing a thing from beginning to end, consistently, the whole time}

その社員(しゃいん)の理論(りろん)的(てき)に終始(しゅうし)を貫(つらぬ)く発言(はつげん)は信頼(しんらい)できます。

You can trust the statements of that employee who consistently adheres to logic from beginning to end. {beginning and end, from beginning to end, doing a thing from beginning to end, consistently, the whole time}

監督(かんとく)：「終始(しゅうし)積極(せっきょく)的(てき)に攻(せ)めればこそ、この試合(しあい)で勝(か)つ事(こと)が出来(でき)るのだ！」

Director: "Only by consistently attacking from beginning to end, can we win this game!" {beginning and end, from beginning to end, doing a thing from beginning to end, consistently, the whole time}

政治(せいじ)家(か)の自己(じこ)弁護(べんご)に終始(しゅうし)する答弁(とうべん)は、聞(き)いていて恥(は)ずかしくなるものでした。

The politician's response, which was focused on defending themselves from beginning to end, was so embarrassing to listen to. {beginning and end, from beginning to end, doing a thing from beginning to end, consistently, the whole time}