schamlos
shameless
Acting without a sense of shame or decency; brazen and insolent.
Er hat die Situation schamlos ausgenutzt, um sich einen Vorteil zu verschaffen.
He shamelessly exploited the situation to gain an advantage for himself.

shameless
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shameless
Acting without a sense of shame or decency; brazen and insolent.
Er hat die Situation schamlos ausgenutzt, um sich einen Vorteil zu verschaffen.
He shamelessly exploited the situation to gain an advantage for himself.

The adjective 'schamlos' (shameless) has a simple structure: it consists of the noun 'die Scham' (shame) and the ending '-los' (-less), which means 'without.' So 'schamlos' literally means 'without shame.'
Sein Verhalten nach dem Fehler war absolut schamlos.
His behavior after the mistake was absolutely shameless.
'Schamlos' (shameless) is very often used in combination with the verb 'ausnutzen' (to exploit). The phrase 'etwas oder jemanden schamlos ausnutzen' (to shamelessly exploit something or someone) means to use a situation or person for one's own benefit without moral hesitation.
Sie hat seine Gutmütigkeit schamlos ausgenutzt.
She shamelessly exploited his good nature.
'Schamlos' (shamelessly) is often used as an adverb to describe a verb. It then remains unchanged in the sentence and expresses that an action is carried out in an insolent way.
Er hat mich vor allen Leuten schamlos angelogen.
He shamelessly lied to me in front of everyone.
cheeky / impertinent
'frech' and 'schamlos' can both describe behavior that crosses boundaries. 'frech' is often disrespectful or impertinent, but depending on the situation it can also seem playful, bold, or even charming. 'schamlos' is much stronger and almost always negative. It means that someone acts without decency and is not ashamed of it. The words can be confused because both have to do with bold insolence. If something is merely impertinent or cheeky, 'frech' fits; if it seems strongly morally inappropriate, 'schamlos' is a better fit.

Der Verkäufer hat den Kunden schamlos belogen, nur um mehr Geld zu bekommen.
The salesperson shamelessly lied to the customer just to get more money.
Der Junge gab der Lehrerin eine freche Antwort, aber er meinte es nicht böse.
The boy gave the teacher a cheeky answer, but he did not mean any harm.