行っていらっしゃい: alternative form of いってらっしゃい (itterasshai)

The そくおん (sokuon): a small form of つ (tsu). In romanization, this is represented by doubling the following consonant. The equivalent in katakana is ッ. / A glottal stop or “choked sound”.

(colloquial) very, super. Inserted after the first syllable of an adjective, an adverb, or an ABAB-type onomatopoeia.

打楽器: percussion instrument

実家: home, hometown / 実科: practical learnings

The hiragana syllable きゃ (kya). Its equivalent in katakana is キャ (kya).

(colloquial) Contraction of ければ (-kereba)

実体論: substantialism

一也: a male given name / 和也: a male given name / 和哉: a male given name / 佳主也: a male given name / 一哉: a male given name

一成, 和成: a male given name