extrañar
/eɡstɾaˈɲaɾ/ · A2 · verb
to cause to find odd/strange
extrañar = extraño (strange) + -ar: it feels strange without you
From Latin extraneus (outside, foreign), the root of English strange and extraneous. To extrañar someone is to feel their absence as something odd. Te extraño = I miss you; me extraña = it strikes me as strange.