4
$\begingroup$

My prefix is not a dub

My infix is a common base

My suffix is a quingenti sub

My whole is a common replace

What am I?

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6
$\begingroup$

My prefix is not a dub

L for lose - dub is a slang abbreviation for the letter W (double-u) usually for a win.

My infix is a common base

$e$ is the base of the natural logarithm.

My suffix is a quingenti sub

D - 500 in Roman numerals.

My whole is a common replace

LED - light-emitting diode, replacing other light bulbs. Diodes only let electricity flow in one direction.

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1
  • $\begingroup$ That was pretty quick, congrats! $\endgroup$
    – David
    Feb 21 '20 at 7:50
3
$\begingroup$

Could you be

PROTEND?

My prefix is not a dub

PRO. One meaning of "dub" is "an inexperienced or unskilful person", and a pro would be the opposite.

My infix is a common base

TEN, a common base for human number systems.

My suffix is a quingenti sub

D, the Roman numeral for 500.

My whole is a common replace

PROTEND seems like a typo for the commoner word PORTEND.

Title:

PROTEND means to extend or stretch forth (in one direction).

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1
  • $\begingroup$ Nice answer! Unfortunately not the one I was looking for, although you got one of the fixes right ;) $\endgroup$
    – David
    Feb 21 '20 at 7:52

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