to act, to appear in a role, to portray a character
Building blocks
näit(ama) - “to show or” “to point out”
-le- - frequentative (expressing repeated, frequent action)
-ma - infinitive ending
Therefore, "näitlema" literally translates to "to be showing" or "to be pointing out" in an ongoing way. This meaning has evolved to signify the act of portraying a character or pretending to be someone else, which is how we understand "to act" in English.
How to use it
Acting in a play or movie:
Ta näitleb peaosa uues filmis.
Translation: He/She is acting in the lead role in the new film.
Pretending or Deceiving:
Ta näitleb haiget, et tähelepanu saada.
Translation: He/She is acting hurt to get attention.
Role-playing:
Lapsed mängivad õues ja näitlevad erinevaid rolle.
Translation: The children are playing outside and acting out different roles.
Drama:
Sa ei pea alati nii palju näitlema, ole lihtsalt sina ise.
Translation: You don't always have to act so much, just be yourself.
Examples
Minu klassikaaslased näitlevad koolinäidendis
Literally: “My classmates are acting school play-in”
Idiomatically: “My classmates are acting in the school play”
Minu - Pronoun - Genitive Sg, "My"
klassikaaslased - Noun - Nominative Pl, "classmates"
näitlevad - Verb - 3P Present Pl, "are acting"
koolinäidendis - Noun - Inessive Sg, "school play-in"