"Explain, please?"

• Question that demands an explanation
• Request for elaboration
• ''In what way?''
• "Care to elaborate?"
• "Could you explain?"
• "In what possible way?"
• In what way?
• "In what way?"

Wiktionary Word definitions in Wiktionary
adv. 1 however#Conjunction, in whatever manner. 2 However, to whatever extent.

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Howso \How"so\, adv. Howsoever. [Obs.]