What is the meaning of Fastest?

superlative form of fast (adjective): most fast

superlative form of fast (adverb): most fast

second-person singular simple present indicative of fast

inflection of fasten:

1. second-person singular present
2. second-person singular subjunctive I

second-person singular present

second-person singular subjunctive I

inflection of fasen:

1. second-person singular preterite
2. second-person singular subjunctive II

second-person singular preterite

second-person singular subjunctive II

Source: wiktionary.org