固

fixing (in place)

characteristic

to harden

hardening

firm

fixed assets

firm

firm

solid (body)

stubborn

fixed cost

solid (body)

solid

coagulation

fixed idea

proper noun

solidification

firm refusal

marriage vows

ground leveling

vitrification

solid-fuel rocket

solid-state laser

verbal promise

solid phase

semisolid

to make a firm resolution

stator

secure

online handle (esp. on an online forum like 2ch where the majority of users post anonymously)

hard disk

fixed disk drive

constant bit rate

fixed head

Bouin fixation

pinned tweet (tweet that always appears at the top of one's account page)

fixed gear (on a bicycle)

to harden earth into a mass

obstinate

solid-state chemistry

to harden by beating

fixed-head disk

adherence (to one's beliefs)

firmly determined

fixed-length

fixed length block

fixed length cell

fixed length packet

fixed length record

to harden

eigenvector

fixed exchange rates

fixed lateral

fixed interest rate

reef knot

hardening

to agree on the principle

serious topic (of conversation)

to fortify the frontier

groundwork

unshakeable (e.g. belief)

grappling technique (e.g. judo)

landline telephone

to settle down

Onmyōdō spell for strengthening one's body

named entity

built-in audience

fixed value

yoko-shiho-gatame (judo hold in which the opponent's shoulders and hips are pinned)

fixed cost

fixed exchange rate system

figure-four leg lock

bouillon cube

fixed price

clinging

sessility

solid (body)

supersolid

proper motion

hard-boiled

pinned tweet

having one's guard up

sharpshooter

eigenvalue

solid state physics

firm

firmly

expected overtime (stipulated as a specific number of hours)

to close or shut tight

violently disagreeing

fixed-width font

landline telephone

regular pay

constant spacing

regular staff

adherence

endemic species

eating only one's favourite food

job private area

fixed effect

solemn promise

intrinsic colour

intrinsic colour data

eigenfunction

fixed-point register

heat fixing

making replacements for defensive purposes in the late inning of a game

fixed overtime pay

pomade

permanent connection

watching (esp. during an emergency)

characteristic vibration

solid food

determined

real estate tax

Boston crab

iron ingot

thickheaded

obstinate

solid-state battery

very cautious (watchful, vigilant)

immovable disk unit

fixed attribute

to press together

fixed liabilities

tate-shiho-gatame (judo)

firm opposition

gathering evidence

permanent virtual connection

fixed file attributes

proper map

native character set

Bouin's solution

fixed-lens camera

characteristic polynomial

solid fuel

fixed-point data

character spacing

to tread down so as to harden (soil, snow, etc.)

stubborn person

to harden by kneading

stiff-consistency concrete

stiff consistency

fixative

fixed idea

tangible fixed assets

fixed decimal mode

being of firm (unshakable) faith and strict practice

(a fortress being) impregnable

intangible fixed assets