and
assalamu alaikum - peace be upon you - said as a greeting
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wa assalaum alaikum - and peace be upon you
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wa alaikum salaam - and upon you peace - returning the greeting
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wa alaikum salaam, wa rahmatullahi wa barakakatu - and upon you peace, and the Mercy of Allah, and His Blessings - extended return greeting
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inshah'Allah - Allah willing - said when one says he is going to do something
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amin - amen - so be it
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alhamdu'Lillah - praise Allah - said as an expression of thanks or praise of Allah
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astagfir'Allah - forgive me Allah




Those more knowledgeable will kindly correct my errors.