komfortabel
comfortable
Offering physical comfort and convenience.
Das neue Hotelzimmer war geräumig und sehr komfortabel eingerichtet.
The new hotel room was spacious and furnished very comfortably.

comfortable
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comfortable
Offering physical comfort and convenience.
Das neue Hotelzimmer war geräumig und sehr komfortabel eingerichtet.
The new hotel room was spacious and furnished very comfortably.

Careful: 'komfortabel' (comfortable) usually describes physical comfort or an easy situation. Unlike the English word 'comfortable,' it is not used to express that you feel emotionally at ease with a topic or with a person.
Dieses Sofa ist wirklich sehr komfortabel.
This sofa is really very comfortable.
'Komfortabel' (comfortable) is the adjective for the noun 'der Komfort' (comfort). The ending '-abel' is typical for adjectives that come from foreign languages and means that something has a certain quality.
Wir suchen ein Hotel mit komfortabler Ausstattung.
We are looking for a hotel with comfortable amenities.
Pay attention to what 'komfortabel' (comfortable) describes. With objects such as furniture or cars, it means physical comfort. With abstract things such as a situation or a lead, it means that the position is easy and favorable.
Das Auto hat eine sehr komfortable Federung.
The car has very comfortable suspension.
'Komfortabel' (comfortable) can also be used as an adverb to describe how an action is carried out. It then means 'in a comfortable way.'
In diesem Sessel kann man sehr komfortabel lesen.
You can read very comfortably in this armchair.
simple / just
'einfach' and 'komfortabel' can both mean that something works without much effort. 'einfach' emphasizes that something is not complicated. 'komfortabel' emphasizes more that something is pleasant and convenient, or that it saves you work. The words can be confused because a comfortable solution is often also simple. But 'komfortabel' says more about how pleasant the process is. A simple solution can be very plain; a comfortable solution also feels convenient or practical.

Mara findet die Reise mit dem direkten Zug sehr komfortabel.
Mara finds traveling by direct train very comfortable.
Beim Einkaufen nimmt sie die einfache Liste, damit sie nichts vergisst.
When shopping, she takes the simple list so she doesn't forget anything.