Questions & Answers about Við leikum feluleik í garðinum á kvöldin.
Leikum is the 1st person plural present form of the verb leika (to play).
Icelandic verbs change form depending on the subject:
- ég leik = I play
- þú leikur = you play
- hann/hún/það leikur = he/she/it plays
- við leikum = we play
- þið leikið = you all play
- þeir/þær/þau leika = they play
So because við means we, the verb has to be leikum.
Feluleik is the accusative singular of feluleikur, which means hide-and-seek.
It is a compound noun:
- fela = to hide
- leikur = game, play
So feluleikur literally means something like hiding game.
In the sentence, it is the direct object of leikum, so it appears in the accusative: feluleik.