soon
adv. timeadv. in a short time from now, or a short time after something else happens.
adv. within a short period of time after the present or after a specified point in time.
The train should be here soon.
We finished our dinner quickly because the movie was starting soon.
Although the initial results were promising, the researchers cautioned that it was too soon to determine if the treatment would be effective in the long term.
From Middle English sone, from Old English sōna (“immediately, at once”), from Proto-West Germanic sān(ō), from Proto-Germanic sēna, sēnô (“immediately, soon, then”), from sa (demonstrative pronoun), from Proto-Indo-European *só (demonstrative pronoun). Cognate with Scots sone, sune, schone (“soon, quickly, at once”), North Frisian san (“immediately, at once”), dialectal Dutch zaan (“soon, before long”), Middle Low German sân (“right afterwards, soon”), Middle High German sān, son (“soon, then”), Old High German sār (“immediately, soon”). Compare also Gothic 𐍃𐌿𐌽𐍃 (suns, “immediately, soon”), from Proto-Germanic *suniz (“soon”).
Typically placed at the end of a clause or after the verb, though it can appear in the initial position for emphasis.
I will see you soonlyI will see you soonSoon is already an adverb; adding the suffix '-ly' is a common error.