mühelos
effortless
Without effort, difficulty, or great exertion. Something that is very easy to manage.
Die Siegerin übersprang die Höhe mühelos.
The winner cleared the height effortlessly.

effortless
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effortless
Without effort, difficulty, or great exertion. Something that is very easy to manage.
Die Siegerin übersprang die Höhe mühelos.
The winner cleared the height effortlessly.

The word is made up of the noun 'die Mühe' (effort) and the ending '-los' (-less). The ending '-los' means 'without', so 'mühelos' literally means 'without effort'.
Dank seiner guten Vorbereitung bestand er die Prüfung mühelos.
Thanks to his good preparation, he passed the exam effortlessly.
'Mühelos' (effortless/effortlessly) can stand before a noun as an adjective or function as an adverb describing a verb. The adverbial use is especially common.
Das war ein müheloser Sieg für die Heimmannschaft.
That was an effortless victory for the home team.
You can 'mühelos schaffen' (manage effortlessly), 'erreichen' (achieve), 'gewinnen' (win), or 'bewältigen' (cope with/manage). Typical nouns are 'ein müheloser Sieg' (an effortless victory) or 'eine mühelose Bewegung' (an effortless movement).
Der Pianist spielte das komplexe Stück völlig mühelos.
The pianist played the complex piece completely effortlessly.
without
'ohne' and 'mühelos' can both express that something is missing which would normally be necessary or difficult. However, 'ohne' is used with a noun or in fixed expressions and says that something is not present, for example 'ohne Hilfe' (without help) or 'ohne Probleme' (without problems). In 'ohne Weiteres', it means roughly 'without difficulty'. 'mühelos' directly describes how easily someone manages something: without great effort. 'ohne' is more natural when you want to say what is not involved. 'mühelos' fits better when you want to emphasize the easy way an action is done.

Die erfahrene Handwerkerin hat die schwere Tür mühelos repariert.
The experienced craftswoman repaired the heavy door effortlessly.
Das Formular kann man ohne Weiteres online ausfüllen.
You can easily fill out the form online.