10-Letter Words Containing: I,S,F,A

• To fold in the middle, as a jackknife does.

• To cause a semi-trailer truck to fold like a jackknife in a traffic accident.

• A jack (in any of the senses referring to types of fish).

• make unfit or unsuitable

• declare unfit

• East Indian tree cultivated for its immense edible fruit and seeds

• immense East Indian fruit resembling breadfruit; it contains an edible pulp and nutritious seeds that are commonly roasted

• make formal or official

• declare or make legally valid

• a common large finch of Eurasia

• resolve (a polynomial) into factors

• indulge in fantasies

• portray in the mind