warthog
Refers to the animal Phacochoerus aethiopicus. The katakana spelling is the usual written form.
I saw a warthog at the zoo.
Katakana spelling is standard for this animal name; usually written in kana.
Kanji spelling is rare and may not be recognized by many readers; the katakana form is strongly preferred.
Compound of 疣 (ibo, 'wart') and 猪 (inoshishi, 'boar'), describing the animal's facial warts. The exact historical derivation is uncertain, but the name is transparently descriptive.