Latin

Gerund

īnsurgendum n ‎(accusative, gerundive īnsurgendus)

1. rising up
   • 1637, Johannes Clüver, Hiſtoriarum Totius Mundi Epitome, “Epitomes…Appendix: Res ab anno hujus ſeculi xxx. uſque in hunc xxxiii. geſtas continens”, page 17:

     In hunc totis caſtris inſurgendum videns Tillius Comes, partem equitulus præmittit, ſubſequitur ipſe cum firmiſſimo exercitu.

     Seeing this uprising in the whole camp, the young knight, Count Tilly, sends ahead a contingent, and himself follows close after with the most steadfast of the army.

Declension

Second declension, defective.

There is no nominative form. The present active infinitive of the parent verb is used in situations that require a nominative form.
The accusative may also be substituted by the infinitive in this way.

Etymology 2

Regularly declined forms of īnsurgendus ‎(“which is to be risen up [against]”).

Participle

īnsurgendum

1. nominative neuter singular of īnsurgendus
2. accusative masculine singular of īnsurgendus
3. accusative neuter singular of īnsurgendus
4. vocative neuter singular of īnsurgendus