[合「あ」]う => To do A together/mutually N4
Secondary Verb
それはそうと => By the way N2
Miscellaneous
はどうあれ => Whatever the A, regardless of the A N1
Based/focused/depending on
であれ,であろうと => Even A, Both A and B N1
(Not)only , (Not) even
てくれてありがとう => Thank you for doing A N4
Honorifics
かれ~かれ => A or B N1
Lists, examples
とあれば => If A N1
Conditional, While
それと => A, and B N3
List, Examples
それとも => A? or B? N3
List, Examples
てくれる => Do for someone. N4
Give and take advice
まみれ => Covered in A (negative condition) N1
Adjectival, Descriptions
それでも => Even though A, B N2
Contrast,Surprise