Appendix:Icelandic middle voice verbs

Icelandic verbs are formed by adding the ending -st to an  verb in any.

When this results in the occurrence of the letters ds, ðs or ts in the same syllable such that only the -s sound is pronounced, the d, ð or t is dropped, for example:
 * stend (I stand) + -st = stenst (I resist)
 * bregð (I brandish) + -st = bregst (I fail)
 * læt (I put)+ -st = læst (I pretend)