"salam aleikum"

bedeutet : Friede sei mit Dir

die antwort lautet standatmässig

" E Aleikum Salam "

bedeutet : Der Friede sei auch mit Dir

ein großes Danke hier an Jochen

Hier noch mal krass korrkt
As-Salāmu `Alaykum (السلام عليكم

und die Erwiederung
wa `Alaykum As-Salām
und
hier die ganze Sprachlehre
As-Salāmu `Alayk(a)—Peace be upon you (m. sing.)

As-Salāmu `Alayk(i)—Peace be upon you (f. sing)

As-Salāmu `Alayk(uma)—Peace be upon you (to two people of any gender)

As-Salāmu `Alaykunn(a)—Peace be upon you (f. plural - to three or more females only)

As-Salāmu `Alaykum—Peace be upon you (To a group of three or more people, where at least one is a male - or to a member of state such as a prime minister, president, king, or queen)

Pax Vobiscum