We humans have certain physiognomic needs and, given the fact that we can express complex thoughts, our basic, physiognomic needs are quite easily expressed.
We have a physiognomic need for food and, when that becomes urgent, we can express that need with a single adjective: hungry.
Some of the basic, vital, survival-level needs that can be expressed with one word include the following:
Each expresses with exquisite brevity a basic lack.
I bring this up because in my Vast Vocabulary, I am missing one of these adjectives and if anyone knows it, I would appreciate the information. It's really going to help my epic poem on the fulfillment of my animal self.
That missing adjective is the one that expresses the need to relieve oneself of waste.
I need to ingest food. (I am hungry.)
I need to get some zzzs. (I am tired.)
I need to sit on the crapper to dispose of that burrito that's been bugging me all day. (I am ...?)