To put something under another object, often in order to support, protect, or raise it. It is a separable verb (legt unter).
example
Kannst du bitte ein paar Bücher unter den Projektor legen, damit das Bild höher ist?
Can you please put a few books under the projector so that the image is higher?
Usage tips
Separable verb
'Unterlegen' is a separable verb in this meaning. The prefix 'unter' goes to the end of the main clause. In subordinate clauses and in the infinitive with 'zu', the verb stays together.
EXAMPLE
Er legt ein Brett unter das wackelige Tischbein.
He puts a board under the wobbly table leg.
Word structure
The verb is made up of the preposition 'unter' (under) and the verb 'legen' (to lay/put). The meaning here is literal: to put something under another thing.
EXAMPLE
Die Sanitäter legten dem Verletzten eine Decke unter.
The paramedics put a blanket underneath the injured person.
Sentence structure
The typical structure in a sentence is: subject + legt + (optional: dative object) + accusative object + 'unter' + place (accusative). So you put 'something' under 'something else'.
EXAMPLE
Leg bitte ein Kissen unter deinen Kopf.
Please put a pillow under your head.
Compare with
antonym · confusable
unterlegen vs führend
leading
'führend' describes a high, important, or first-place position. 'unterlegen', in the meaning intended here, is a verb and means to put something underneath an object. In terms of meaning, these two words therefore do not really fit together as true opposites. What can be confusing is that 'unterlegen' can look like an adjective, while here it is used as a separable verb: you put something underneath. So pay attention to the sentence structure: 'führend' describes a role or position, while 'unterlegen' describes a concrete action.
unterlegen
Bitte leg ein Tuch unter, damit der Tisch nicht zerkratzt.
Please put a cloth underneath so the table doesn't get scratched.
führend
Timo arbeitet heute mit einem führenden Koch aus Berlin zusammen.
Today Timo is working with a leading chef from Berlin.