anstecke
Anstecke is not a stand-alone entry in standard German; it is a form related to the separable-prefix verb anstecken. In normal usage, the prefix an is separated in present-tense clauses, so you would typically see phrases like ich stecke das Schild an die Wand rather than anstecke as a single word. The past participle of the verb is angesteckt.
The primary senses of the related verb anstecken are twofold. First, to infect or transmit a disease
Grammatically, anstecken is a separable-prefix verb; in main clauses the prefix tends to move to the end: