at issue (?.)
- against the grain
- against the tide
- against the wind
- arguable
- at cross-purposes
- at daggers
- at daggers drawn
- at odds
- at variance
- at war with
- athwart
- before the house
- conditional
- conditioned
- confutable
- conjectural
- contestable
- contingent
- contra
- contrariwise
- controversial
- controvertible
- counter
- cross
- debatable
- deniable
- dependent
- depending
- disputable
- doubtable
- doubtful
- dubious
- dubitable
- eyeball-to-eyeball
- iffy
- in confrontation
- in debate
- in dispute
- in doubt
- in dubio
- in hostile array
- in opposition
- in question
- in suspense
- in the balance
- mistakable
- moot
- on the agenda
- on the docket
- on the floor
- on the table
- open
- open for discussion
- open to doubt
- open to question
- pendent
- pending
- problematic
- questionable
- refutable
- speculative
- sub judice
- suppositional
- suspect
- suspenseful
- suspicious
- uncounted
- undecided
- under active consideration
- under advisement
- under consideration
- under examination
- under investigation
- under surveillance
- undetermined
- unestablished
- unfixed
- unsettled
- untold
- up for grabs
- up in arms
- with crossed bayonets
