As-Salam Alaikum Wa-rahmatullah Wa-barakatuh!IS IT Jzk, JazakAllah, JazakAllah Khair, Jazaka Allahu Khair or Jazaka Allahu Khairan?JAZAKA ALLAHU KHAIRAN (Jazaka Allahu Khairan)!Understanding the Grammar Behind The word---- Jazaka Allahu Khairan! Jazak comes from the root word Jazaa which according to the popular Arabic-English dictionary, Al-Mawrid, has two meanings that are completely oppositeto each other!Thus Jazaa can either mean Reward OR Punishment.So :"JazakAllah" can may either mean "Allah reward you" or punish you, while "Jazaka Allahu Khairan" means ..."Allah reward you with the Best /Good."So the correct way is to say Jazaka Allahu Khairan & not just Jzk or Jazak Allah. Though someone might say that the intention by saying Jzk or JazakAllah is the same like Jazak Allahu Khairan, if its so, then why not use the complete wordings as used by the Prophet(sal Allahu alahi Wa-salam) and the sahabas! Which is Jazaka Allahu Khairan!Jazaka Allahu Khairan depending on situation:Masculine: Jazaka Allahu Khairan!Feminine: Jazaki Allahu Khairan!Plural: Jazakum Allahu Khairan!Substitute for Jazaka Allahu Khairan is Baraka Allahu Feeh("Bessings of Allah be upon you."How to Reply to Those who saysJazaka Allahu Khairan to you:1⃣ Wa Antum Fa Jazaka Allahu Khairan meaning "And you too, Allah reward you with Khair".Evidence from Sunnah: Usayd ibn Hadayr (sahabi)I said:- O Messenger of Allah:ﺟﺰﺍﻙ ﺍﻟﻠﻪ ﺧﻴﺮJazaka Allahu Khairan IThe Prophet(pbuh)said:ﻭَﺃَﻧْﺘُﻢْ ﻓَﺠَﺰَﺍﻛُﻢُ ﺍﻟﻠَّﻪُ ﺧَﻴْﺮًﺍWa Antum Fa Jazakum Allahu khairan. (And(all of) you too, Allah reward you with Khair).[Wa Anta Fa Jazaka Allahu Khairan!] Masculine![Wa Anti Fa Jazaki Allahu Khairan!] Feminine![Albaani has said that the Hadeeth is Saheeh in al-Saheeha 3096, al-Ta'leeqaatulhisaan al Saheeh ibn Hibbaan 6231]2⃣ Wa Iyyakum (ﻭﺇﻳﺎﻛﻢ)” / Wa Iyyaka or Wa Iyyaki. Meaning:“And goodness to you also”This is the common message used by people. Muslims canuse this phrase sometimes, and abandon it sometimes, butthey must not cling to it as if it is an established Sunnah of the Messenger since there is no evidence related to it.Conclusion:It’s a kind suggestion to all, that don’t just be a follower of prophet(pbuh) name. Rather you should follow his sunnah. The correct sunnah is not to say Thanks or Shukran rather its to say Jazaka Allahu Khairan or Baraka Allahu Feeh. This should be replied with Wa Antum Fa Jazaka Allahu Khairan. Lets revive this sunnah in our lives In shaa Allah & motivate others to do the same so the reward goes round for reviving a sunnah ma shaa ALLAH! Remember that ALMIGHTY ALLAH (SWT) is Gafur-ur Rahiim.

Jazaki Allah khairan op for this. For the article to be soothing to the eyes, please do employ the use of paragraphs. Jumu'ah mubarak