godan ~す verb / transitive:

• to be frank; to speak one's mind; to open one's heart ➜ 打明ける

godan ~く verb / transitive:

• to peel; to skin; to pare; to hull; to bare (e.g. fangs); to open wide (e.g. eyes)

ichidan verb / intransitive verb:

• to come apart at the seams; to be ripped; to be torn ➜ 綻ぶ【ほころぶ】
• to begin to open; to begin to bloom ➜ 綻ぶ【ほころぶ】
• to smile broadly; to break into a smile ➜ 綻ぶ【ほころぶ】

godan ~る verb / transitive:

• to stand watch; to stand guard; to look out ［見張る］
• to open one's eyes wide ➜ 目を見張る

expression / godan ~る verb:

• to be the first to speak; to break the silence - idiom
• to open something for the first time; to broach (e.g. a cask); to break a seal; to break open

godan ~く verb / transitive:

• to disclose; to divulge; to expose
• to open (and rob) a grave

expression / ichidan verb:

• to make way for; to make room for; to get out of the way - esp. 道を空ける
• to pave the way for; to open up opportunity - esp. 道を開ける

godan ~る verb / transitive:

• to reel; to wind; to spin (thread)
• to turn (pages); to flip through (a book); to leaf through (a book); to consult (a dictionary); to refer to (an encyclopedia)
• to count (e.g. the days)
• to open one-by-one; to close one-by-one (e.g. shutters)

godan ~る verb / transitive:

• to filch; to snatch; to pinch; to swindle; to cheat (someone out of something); to rip off
• to steal (an idea, work, etc.); to plagiarize
• to arrest; to nab; to round up
• to open one's mouth wide and eat heartily; to gulp down food

ichidan verb / intransitive verb:

• to be open (to traffic); to lead to; to communicate (with)
• to flow (liquid, current); to pass; to get through to
• to be understood; to be comprehended
• to be honored; to be good
• to be well versed in; to be well-informed
• to communicate clandestinely; to keep in touch (e.g. with the enemy)
• to form a liaison; to be intimate
• to spread widely; to disseminate

ichidan ~ずる verb (alt. form of じる verbs) / intransitive verb:

• to be open (to traffic); to lead to; to communicate (with) ➜ 通じる
• to flow (liquid, current); to pass; to get through to
• to be understood; to be comprehended
• to be honored; to be good
• to be well versed in; to be well-informed
• to communicate clandestinely; to keep in touch (e.g. with the enemy)
• to form a liaison; to be intimate

noun:

• open to all; taking part on the spur of the moment

ichidan verb:

• to force open; to push open

godan ~く verb:

• to push open

ichidan verb / transitive:

• to forcefully open up a hole (in a wall, etc.)
• to speak frankly, holding nothing back ➜ 打ち明ける【うちあける】
• to throw out (everything inside)

godan ~す verb:

• to leave open

ichidan verb / transitive:

• to pull open

noun:

• forming a four-of-a-kind by adding a self-drawn tile to an open three-of-a-kind - Mahjong term - From Chinese ➜ 加槓・槓

godan ~つ verb / transitive:

• to throw open; to leave open

expression / godan ~う verb:

• to have a bath in the open air

expression / ichidan verb:

• to be read like an open book; to be seen through - idiom

adverb:

• to burst open; to open suddenly (of a door) - onomatopoeia
• to change completely; to do a 180

godan ~る verb / transitive:

• to kick in or open; to smash through

godan ~る verb / transitive:

• to cut open; to cut apart; to divide; to split

ichidan verb / intransitive verb:

• to burst open; to split open; to pop
• to be bursting with (e.g. youth, laughter, flavor)
• to bounce; to bound