of appearance: P. and V. σκυθρωπός, γοργός (Xen.), V. στυγνός, δύσχιμος, γοργώψ, γοργωπός; see also fierce.
alarming: P. and V. δεινός.
harsh: P. and V. πικρός, σχέτλιος; see harsh.
determined: P. and V. αὐθάδης, σκληρός.
of things: P. ἰσχυρός.