Watch out

From Fresh Dictionary

English

Verb

watch out

1. ((idiomatic{{#if:|, {{{2}}}{{#if:|, {{{3}}}{{#if:|, {{{4}}}{{#if:|, {{{5}}}{{#if:|, {{{6}}}{{#if:|, {{{7}}}{{#if:|, {{{8}}}{{#if:|, {{{9}}}}}}}}}}}}}}}}}}})) To be aware or conscious; to look closely or carefully; to use caution. Often used in the imperative.

   Watch out for low doorways, so you don't hit your head.

fr:watch out