1) Angrily 2) Bitterly 3) Cold-heartedly 4) Coolly 5) Frigidly 6) Frostily 7) Icily 8) In a calculating manner 9) In a cold unemotional manner 10) In a standoffish manner 11) In an unfeeling way 12) In cold blood 13) Without emotion 1) Callously 2) Coolly 3) Dourly 4) Heartlessly 5) Icily 6) Unsympathetically 
• (adv.) In a cold manner; without warmth, animation, or feeling; with indifference; calmly.
Cold'ly adverb In a cold manner; without warmth, animation, or feeling; with indifference; calmly. « Withdraw unto some private place, And reason coldly of your grievances. Shak. » 
[adv] - in a cold unemotional manner
adverb in a cold unemotional manner; `he killed her in cold blood`