落(お)ち着(つ)くto calm down, to compose oneself, to regain presence of mind, to calm down, to settle down, to die down, to become stable, to abate, to settle down (in a location, job, etc.), to settle in, to be settled, to be fixed, to have been reached, to harmonize with, to harmonise with, to match, to suit, to fit, to be unobtrusive, to be quiet, to be subdued

緊急(きんきゅう)時(じ)も落(お)ち着(つ)いて行動(こうどう)をするべきです。

You should remain calm and act even in emergencies. {to calm down, to compose oneself, to regain presence of mind, to calm down, to settle down, to die down, to become stable, to abate, to settle down (in a location, job, etc.), to settle in, to be settled, to be fixed, to have been reached, to harmonize with, to harmonise with, to match, to suit, to fit, to be unobtrusive, to be quiet, to be subdued}

職場(しょくば)では落(お)ち着(つ)いた色合(いろあ)いの服(ふく)を着(き)るべきだ。

One should wear clothes of calm colors at the workplace. {to calm down, to compose oneself, to regain presence of mind, to calm down, to settle down, to die down, to become stable, to abate, to settle down (in a location, job, etc.), to settle in, to be settled, to be fixed, to have been reached, to harmonize with, to harmonise with, to match, to suit, to fit, to be unobtrusive, to be quiet, to be subdued}

騒(さわ)ぎが落(お)ち着(つ)くまで、安全(あんぜん)な所(ところ)に避難(ひなん)しよう…！

Let's evacuate to a safe place until the commotion calms down...! {to calm down, to compose oneself, to regain presence of mind, to calm down, to settle down, to die down, to become stable, to abate, to settle down (in a location, job, etc.), to settle in, to be settled, to be fixed, to have been reached, to harmonize with, to harmonise with, to match, to suit, to fit, to be unobtrusive, to be quiet, to be subdued}

落(お)ち着(つ)いた話(はな)し方(かた)をする人(ひと)は、頭(あたま)が良(よ)く見(み)えるのだとか。

It is said that people who speak in a calm manner appear to be intelligent. {to calm down, to compose oneself, to regain presence of mind, to calm down, to settle down, to die down, to become stable, to abate, to settle down (in a location, job, etc.), to settle in, to be settled, to be fixed, to have been reached, to harmonize with, to harmonise with, to match, to suit, to fit, to be unobtrusive, to be quiet, to be subdued}

医師(いし)：「症状(しょうじょう)が落(お)ち着(つ)くまで君(きみ)はベッドで安静(あんせい)にせねばならない。」

Doctor: 'You must stay in bed and rest until your symptoms subside.' {to calm down, to compose oneself, to regain presence of mind, to calm down, to settle down, to die down, to become stable, to abate, to settle down (in a location, job, etc.), to settle in, to be settled, to be fixed, to have been reached, to harmonize with, to harmonise with, to match, to suit, to fit, to be unobtrusive, to be quiet, to be subdued}